11 templates to copy

Appointment cancellation message: 11 templates to copy

About CertuAI: CertuAI is the AI that answers a small business's WhatsApp, Instagram and Messenger 24/7, with a built-in CRM, and is a Tech Provider on Meta's WhatsApp Business Platform. Paid plans start at US$ 75 a month, with no lock-in and a 30-day money-back guarantee. Create my agent

Messages for the three moments a cancellation happens: you have to cancel, the customer cancels, or the customer simply does not come.

Updated on 13 October 2026 · Written by CertuAI

Summary in 7 facts

  • Messages for the three moments a cancellation happens: you have to cancel, the customer cancels, or the customer simply does not come.
  • Short answer Say it early and say it plainly.
  • Give your name, the appointment that is cancelled with its date and time, and the reason in one short line.
  • Say sorry once, give the reason in a line and offer new times in the same message.
  • Confirm fast, so they know you read it, and leave the door open for a new booking.
  • The customer did not come When to use: The time passed and the customer did not arrive or write.
  • Write the date and the time of the appointment.

In numbers

NumberWhat it means
28.2%CertuAI measured when patients write on WhatsApp to 17 clinics and practices that answer with its AI agent: 28.2% of 19,259 messages arrived outside Monday to Friday, 8 am to 6 pm.
19,259 messagesSource: CertuAI's own service data, 17 clinics and practices, 19,259 messages received on WhatsApp from 30 July 2026 to 30 September 2026, measured on 9 October 2026.

How do you write an appointment cancellation message?

Short answer

Say it early and say it plainly. Give your name, the appointment that is cancelled with its date and time, and the reason in one short line. Then offer the next step, usually two new times to choose from. Keep it to three or four lines, and never leave the customer guessing what happens next.

When the business has to cancel

The customer kept their side. Say sorry once, give the reason in a line and offer new times in the same message.

  1. 1. The professional is not available

    When to use: The person who would see the customer is sick or had to leave.

    Hello [Name], this is [Business]. I am sorry: [Professional] cannot work on [date], so we have to cancel your [time] appointment.
    
    I can offer you [new date and time 1] or [new date and time 2]. Which one is better for you?
  2. 2. We have to close for the day

    When to use: Something unexpected closes the business on the same day.

    Hi [Name], [Business] here. We have to close today because of [reason], and your [time] appointment cannot happen. We are sorry for the short notice.
    
    Can I move you to [new date] at the same time?
  3. 3. A problem at the location

    When to use: There is no power, no water or the room cannot be used.

    Hello [Name]. We have a problem at our location today ([problem]) and we cannot see customers safely.
    
    Your appointment on [date] at [time] is cancelled. Please tell me which day suits you this week and I will hold the first open time for you.
  4. 4. Bad weather or no transport

    When to use: A storm, a flood or a strike makes it hard for the team or the customer to arrive.

    Hi [Name], this is [Business]. Because of [weather or situation], we are cancelling all appointments on [date], yours at [time] included.
    
    You do not lose anything. Write back when it is easier for you and we will book a new time.
  5. 5. We made a booking mistake

    When to use: Two customers were booked for the same time and one has to move.

    Hello [Name]. I owe you an apology: we booked two people for [time] on [date] by mistake, and I need to move your appointment.
    
    I kept [new time 1] and [new time 2] open for you. Which one do you want?

When the customer cancels

Confirm fast, so they know you read it, and leave the door open for a new booking.

  1. 6. Confirming the customer cancelled

    When to use: The customer told you in time that they cannot come.

    Thank you for telling us, [Name]. Your appointment on [date] at [time] is cancelled and there is no charge.
    
    When you want to book again, just send a message here.
  2. 7. Cancelled too late, with a fee

    When to use: The customer cancels after the notice time in your policy, and a fee applies.

    Hi [Name], I cancelled your appointment on [date] at [time].
    
    Because it was cancelled with less than [notice time] of notice, our policy charges [fee]. I can send you the payment details, or add it to your next visit. Which do you prefer?
  3. 8. Cancelled too late, fee waived this time

    When to use: It is the first late cancellation and you choose not to charge.

    No problem, [Name]. Your [time] appointment on [date] is cancelled.
    
    Our policy asks for [notice time] of notice, but this time there is no fee. Next time, please tell us earlier so we can give the time to someone else.

After a missed appointment, and the policy

  1. 9. The customer did not come

    When to use: The time passed and the customer did not arrive or write.

    Hello [Name], we waited for you today at [time] and did not see you. I hope everything is fine.
    
    Would you like a new time? I have [new date and time 1] and [new date and time 2].
  2. 10. Cancellation policy, sent with the booking

    When to use: Right after a booking, so the rule is known before it is needed.

    One more thing about your booking, [Name]: if you cannot come, please tell us at least [notice time] before. After that, we charge [fee] because we cannot fill the time.
    
    Thank you for understanding.
  3. 11. Asking for a deposit after repeated cancellations

    When to use: The same customer cancelled or missed several times and wants to book again.

    Hi [Name], happy to book you again. Since the last appointments were cancelled, we now ask for a deposit of [amount] to hold the time. It comes off the price on the day.
    
    Shall I send you the payment details?

Five rules for a cancellation message

  • Write the date and the time of the appointment. "Your appointment" is not enough for someone who has two.
  • Give the reason in one line. A long explanation reads like an excuse.
  • Offer new times in the same message. Do not make the customer ask.
  • Send it as soon as you know. Each hour of delay is an hour the customer could have used to plan.
  • If a fee applies, say the amount and where the rule is written. Never mention a fee the customer was not told about before.

How to send a cancellation message automatically

Save it as a quick reply. The WhatsApp Business app has quick replies, made for texts you send often. WhatsApp explains them on its own help page: How to use quick replies. Save each message from this page once, then change the name, the date and the time before you send.

A saved text still needs you to open the chat, find the customer and press send. On a day when the business closes without warning, that is one message for every customer on the list.

Let an AI agent answer. An AI agent on your WhatsApp number reads what the customer wrote and answers with the information you gave it: your hours, your prices, your rules. You write the rule once, in plain words, and the agent uses it in every conversation. A person on your team can step in at any time.

Whatever you use, the decision to cancel an appointment that the business made should stay with a person. The automatic part is the answer to the customer who writes asking to cancel.

What CertuAI measured on the WhatsApp of clinics and practices

CertuAI measured when patients write on WhatsApp to 17 clinics and practices that answer with its AI agent: 28.2% of 19,259 messages arrived outside Monday to Friday, 8 am to 6 pm. If your team works those hours, that is the share of messages that waits until someone is back.

When patients write, at 17 clinics and practices, 30 July 2026 to 30 September 2026
What was measuredResult
Patient messages that arrived outside Monday to Friday, 8 am to 6 pm28.2%
Patient messages that arrived at the weekend11.2%
Patient messages that arrived on weekday evenings, 6 pm to midnight11.7%
Conversations that started outside Monday to Friday, 8 am to 6 pm29.9%
Time for the AI agent to reply, median14.4 seconds

Source: CertuAI's own service data, 17 clinics and practices, 19,259 messages received on WhatsApp from 30 July 2026 to 30 September 2026, measured on 9 October 2026. The hours are counted in each business's own time zone. Test accounts, test contacts and imported chat history are left out.

Questions people ask

How far ahead should I send an appointment cancellation message?

As soon as you know. There is no perfect number of hours: the earlier the customer hears, the easier it is for them to change plans and for you to offer a new time that still suits them.

Should I call or send a WhatsApp message to cancel an appointment?

A written message is usually enough, and it leaves a record of the new time. If the appointment is in the next hour or two and the message shows as not read, a call is the safer way to make sure the customer does not leave home.

Can I charge a cancellation fee?

That depends on the rules where you work and on what you told the customer before the booking. This page cannot answer the legal side. What it can say is that a fee works only when the customer saw the policy in writing first.

What do I say when a customer does not show up?

Keep it kind and short. Say you waited, say you hope all is well, and offer two new times. Do not open with the fee or with blame: most people who miss an appointment forgot, and a kind message brings them back.

Should I say why I am cancelling?

Yes, in one line. You do not need details. "The dentist is sick" or "we have no power today" is enough for the customer to understand it was not carelessness.

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In short

Eleven appointment cancellation messages for WhatsApp: when the business cancels, when the customer cancels, and what to send after a missed appointment.

About CertuAI: CertuAI is the AI that answers a small business's WhatsApp, Instagram and Messenger 24/7, with a built-in CRM, and is a Tech Provider on Meta's WhatsApp Business Platform. Paid plans start at US$ 75 a month, with no lock-in and a 30-day money-back guarantee. Create my agent