Booking

Message for booking: 12 templates to schedule, remind and reschedule

Quick answer

How do I send a booking message?

A good booking message asks all at once for what is missing to book, confirms the day, time and address in writing, and reminds the customer a day before, asking for a short reply. Rescheduling and canceling get easy when the message itself already says how.

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. Create my agent

Messages for each step of the calendar: book, confirm, remind the day before, reschedule, cancel and follow up with no-shows. Copy and change what's in brackets.

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Updated September 25, 2026 · Written by , CEO of CertuAI · Florianópolis (SC) · We serve all of Brazil

Summary in 7 facts

By the numbers

NumberWhat it means
30 templatesSee the 30 automatic message templates for customers, grouped by moment.
10 minutesPlease arrive about 10 minutes early.now ✓✓ Copy Confirmation with a request for a reply When you need the customer to confirm.
24 hoursAn important notice: cancellation with less than [24 hours] notice [is charged or forfeits the deposit].

When to send each booking message

The six moments of the calendar, from the request to the no-show.

When to send each booking message
MessageWhen to sendWhat it needs to include
BookAs soon as the customer asksTwo or three time options
ConfirmRight after reservingDay, time, address and professional
ReminderOne day before and a few hours beforeAn easy way to say they're not coming
RescheduleAs soon as someone can't make itThe new options in the same message
CancelWhen the customer cancelsConfirmation that the slot was released
No-showThe same dayA question without scolding and new times

Swipe the table sideways to see all the columns.

Message to book a time with the customer

  1. First reply to someone who wants to book

    The customer asked for a time.

    Claro, vamos marcar! Tenho vaga na [dia] de manhã e na [dia] à tarde. Qual período fica melhor pra você?
    now ✓✓
  2. Details before reserving

    When you need information to reserve.

    Para eu reservar o horário, preciso só do seu nome completo e de um telefone para contato. Pode me mandar aqui?
    now ✓✓
  3. Confirmation right after booking

    As soon as the time is reserved.

    Agendado! [Serviço] na [dia], [data], às [hora], com [profissional]. Endereço: [endereço]. Chegue uns 10 minutos antes, por favor.
    now ✓✓
  4. Confirmation with a request for a reply

    When you need the customer to confirm.

    Oi, [Nome]! Só para confirmar: o seu horário de [serviço] é na [data], às [hora]. Está certo? Me responde com um ok.
    now ✓✓
  5. WhatsApp conversation with a demo clinic: the customer picks Thursday at 2 p.m. and the AI asks only for a first name to confirm the evaluation
    CertuAI demo with a fictional clinic: the customer picks the time and the AI asks only for what is missing to confirm.

Once the time is booked, the confirmation texts are in booking confirmed message.

Appointment reminder message

  1. Reminder the day before

    One day before, in the late afternoon.

    Oi, [Nome]! Passando para lembrar do seu horário amanhã, [data], às [hora]. Se não puder vir, me avisa hoje, que eu libero a vaga para outra pessoa.
    now ✓✓
  2. Reminder a few hours before

    Two or three hours before.

    [Nome], daqui a pouco, às [hora], é o seu horário. Se for se atrasar, me manda uma mensagem que eu aviso aqui.
    now ✓✓

Message to reschedule and cancel

  1. Customer asked to reschedule

    When the customer can't make it.

    Sem problema, [Nome]! Seu horário de [data] foi cancelado. Tenho [dia] às [hora] ou [dia] às [hora]. Qual fica melhor?
    now ✓✓
  2. You need to reschedule

    When the unexpected event is on your side.

    Oi, [Nome]. Tive um imprevisto e não vou conseguir te atender na [data], às [hora]. Me desculpe. Posso te encaixar na [dia] às [hora] ou na [dia] às [hora]?
    now ✓✓
  3. Cancellation confirmed

    When the customer cancels.

    Tudo certo, [Nome], seu horário de [data] às [hora] está cancelado. Quando quiser marcar de novo, é só chamar aqui.
    now ✓✓
  4. Cancellation rule

    Along with the confirmation, if you charge for no-shows.

    Um aviso importante: cancelamento com menos de [24 horas] de antecedência [é cobrado ou perde o sinal]. Se precisar mudar, me avisa o quanto antes.
    now ✓✓

More templates for cancellation, no-shows and booking deposits →

Message for the customer who didn't show up

  1. On the day of the no-show

    One or two hours after the missed appointment.

    Oi, [Nome], senti sua falta hoje às [hora]. Aconteceu alguma coisa? Se quiser, já te passo novos horários.
    now ✓✓
  2. A few days later

    If the person didn't answer that day.

    Oi, [Nome]! Ainda quer fazer o [serviço]? Esta semana tenho vaga na [dia] e na [dia]. É só responder com o dia que eu reservo.
    now ✓✓

Three rules for the booking message

What prevents no-shows, time mix-ups and back-and-forth messages.

01

Confirm in writing what matters

Day of the week, date, time, address and with whom. The customer checks the message on the day and doesn't need to ask again.

02

Ask for a one-word reply

"Reply yes to confirm" gets an answer. "We are at your disposal for anything" doesn't.

03

Make it easy to tell you they're not coming

Someone who knows they can cancel by message lets you know ahead, and the slot goes to another customer.

See how it looks in your industry

Each industry gets different questions on WhatsApp. Pick yours to see how CertuAI's AI serves that kind of customer.

How to automate confirmation and reminders

The WhatsApp Business app doesn't know your calendar, so the reminder doesn't go out on its own there.

  1. Save the templates as quick replies

    Create shortcuts like /confirm, /reminder and /reschedule under Tools, Quick replies.

  2. Send tomorrow's list in the late afternoon

    Open the next day's calendar and send the reminder to each person. With the quick reply, it takes a few minutes.

  3. Decide what to do with people who didn't confirm

    A call, or releasing the slot, if that is your rule and the customer knew about it beforehand.

  4. Connect the calendar to WhatsApp when volume grows

    With the calendar connected to the number, the reminder goes out on its own before each appointment, and the answer is recorded.

Appointment and visit reminders: what to watch for

A good reminder spells out the date, like “Thursday, March 12”, and not just “tomorrow”, because the customer may open the message the next day. And it always says what to do if the person can't come.

For clinics and practices, the patient templates are in message templates for clinics and appointment rescheduling message. If you want the customer to pick the time on their own, see the free booking page.

The other messages of the day are in the list of automatic messages for customers, and the notice for people who try to book while the business is closed is in the business hours message. A virtual secretary on WhatsApp does this work by talking to the customer. If the customer wants to book right away, without waiting for someone to see the message, the AI that books appointments on WhatsApp talks to them and offers the open slots on the calendar.

Frequently asked questions

How do I send a booking confirmation message?

Right after booking, send the service, the day of the week, the date, the time, the address and the name of who will see them. The day before, ask the customer to reply yes to confirm.

What message should I send to remind the customer of the appointment?

One with the date spelled out, the time and an easy way to say they're not coming, like "if you can't make it, tell me today and I'll release the slot".

How long before should I send the reminder?

One day before, in the late afternoon, and again two or three hours before. The one the day before leaves time to fit in someone else if the customer cancels.

What should I write when the customer doesn't show up?

Ask if something happened, without scolding, and offer new times in the same message.

Can I charge people who don't show up?

If the rule was agreed beforehand, preferably in writing in the confirmation. Charging for a rule the customer didn't know about usually turns into a fight.

Does WhatsApp Business send booking reminders on its own?

No. The app has no calendar, so it doesn't know anyone's appointment time. The reminder goes out by hand, with a quick reply, or through a calendar system connected to your number.

Where to go next?

The AI books, confirms and reminds on its own, in your tone

With CertuAI, the AI agent offers the open slots on your calendar, confirms in writing and sends the reminder before each appointment, without anyone on the team having to remember. Whoever replies that they won't make it already gets new options.

From US$ 75 per month.

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Claro, vamos marcar! Tenho vaga na [dia] de manhã e na [dia] à tarde. Qual período fica melhor pra você?
now ✓✓

This is the first message on this page, sent by the AI in your tone, with nobody at the counter.

In short

How do I send a booking message? A good booking message asks all at once for what is missing to book, confirms the day, time and address in writing, and reminds the customer a day before, asking for a short reply. Rescheduling and canceling get easy when the message itself already says how.

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. Create my agent