AI answering service with appointment booking: the slot is booked during the call.
An AI answering service with appointment booking doesn't just record a message: it answers, offers a free slot from your calendar and books it during the call. Sayelo does this 24/7 in Google Calendar, Microsoft 365 or Cal.com, with a confirmation SMS, from €39 excl. VAT/month.
Your booking rules are followed on every call, and you are notified of every appointment, even on WhatsApp.
from €39 excl. VAT/month afterwards · no commitment · the AI announces itself on every call
Step by step
From phone call to confirmed appointment.
The caller asks for an appointment
The AI answering service announces itself as an AI, identifies the reason for the call and asks the questions you have chosen: name, number, useful details.
It reads your calendar live
It only offers free slots that follow your rules: length of the appointment type, buffer time, minimum notice, booking window.
The slot is booked
The appointment goes into your calendar during the call, with a double-booking lock.
The customer receives an SMS
A confirmation straight away, then a reminder the day before the appointment.
You are notified
An email summary, the appointment visible in the app and, if you switch it on, a WhatsApp message.
Your rules
Slots that fit the way you work.
You set the rules once in Sayelo, in the appointment settings of your connected calendar, and they then apply to every call, on your Google Calendar, Microsoft 365 or Cal.com.
- Reasons and durations: each type of appointment has its own length. If no reason is set up, no appointment is booked.
- Slot interval and buffer time: the gap between two possible start times, and a margin between two appointments.
- Minimum notice and booking window: no appointments booked too late, or too far ahead.
- Cancellation deadline: the limit you set for cancelling or rescheduling.
- Double-booking lock: a slot cannot be booked twice.
After the booking
Confirm, reschedule, cancel.
A customer calls back to change the day? The AI answering service finds their appointment, offers another slot, updates the calendar and sends them an SMS. The same goes for a cancellation. On your side, the “Appointments” page in the app lets you add, move or cancel appointments, and you can also ask your agent by message, with confirmation.
For the business owner
Every appointment on WhatsApp.
If you switch it on, you receive a WhatsApp message for every appointment booked, moved or cancelled by the agent, with the reason and phone number, and the daily report every morning. WhatsApp is for the business owner: your customers book by phone. AI receptionist you can manage on WhatsApp →
Compare
Traditional voicemail or AI answering service?
| Traditional voicemail | Sayelo AI answering service | |
|---|---|---|
| The caller's experience | They leave a message, if they leave one at all | They get an answer and an appointment |
| The appointment | To be arranged by calling back later | Booked during the call, in your calendar |
| Confirmation | None | SMS straight away, reminder the day before |
| A change of appointment | One more message to deal with | Moved or cancelled by phone, SMS sent |
| An emergency | Discovered when listening to voicemail | Transferred according to your rules |
The point-by-point comparison: AI voice agent or voicemail.
Pricing and setup
Included from €39 excl. VAT/month, in 5 minutes.
Appointment booking is included in all four plans, from €39 to €279 excl. VAT a month, with a 14-day free trial. Your agent is ready in 5 minutes; you then connect your calendar and add your appointment reasons. You keep your number, by call forwarding or, in France, by porting, and data is hosted in France by an HDS-certified host. See pricing →
Frequently asked questions
Your questions, our answers.
How does the AI answering service avoid double bookings?
It reads your calendar live during the call and applies a double-booking lock: the same slot cannot be booked twice, even if two people call at the same time.
Can I limit the slots it offers?
Yes. You set the length of each appointment type, the slot interval, a buffer time between two appointments, the minimum notice and the booking window, meaning how far ahead people can book. It only offers slots that follow these rules.
Which calendars are compatible?
Google Calendar, Microsoft 365 or Cal.com. The Google Calendar setup guide explains the setup step by step, and another guide covers Microsoft 365 and Cal.com.
Does the customer receive confirmation of their appointment?
Yes: a confirmation SMS right after booking, then a reminder the day before. If they move or cancel their appointment, they also receive an SMS. The number of SMS included depends on the plan.
Can a customer move or cancel their appointment by phone?
Yes. The AI answering service finds the appointment, offers another slot or cancels it, updates your calendar and sends the corresponding SMS, within the cancellation deadline you have set.
What happens if no appointment reason is set up?
It doesn't book any appointments: it gives the caller information, takes a message or transfers the call. Just add at least one reason, with its duration, for it to start booking.
Am I notified of every appointment booked?
Yes: by the email summary sent after every call, on the “Appointments” page in the app and, if you switch it on, by a WhatsApp message for every appointment booked, moved or cancelled.
How much does an AI answering service with appointment booking cost?
Appointment booking is included from the Solo plan, at €39 excl. VAT a month, with no set-up fees or minimum term. 14-day free trial.
Updated on 26 October 2026.
Further reading
To find out more.
- Guide: setting up Google Calendar for appointment booking
- Guide: confirmation SMS to prevent forgotten appointments
- Guide: booking appointments by phone
- Comparison: AI voice agent or traditional voicemail
- AI virtual receptionist: answer, transfer, summarise
- AI voice agent for tradespeople: quote appointments and emergencies
- AI receptionist you can manage on WhatsApp: what you can ask it
Book a slot
with the agent.
The agent calls you back on your mobile: ask it for an appointment, as a customer would. Three minutes, free, no bank card needed.