How to book appointments on WhatsApp with AI: a complete guide for businesses

In Latin America, WhatsApp is where customers ask for appointments: at the doctor's office, the barbershop, the spa or the accountant. The problem is that those messages arrive while the team is serving people in person, at night or on weekends. An AI assistant closes that gap: it chats like a receptionist, checks the calendar and leaves the appointment confirmed.

What an AI that books WhatsApp appointments does

• Understands natural messages such as "anything tomorrow afternoon?".
• Identifies the service, its duration and the professional who provides it.
• Checks the calendar and offers only slots that are really free.
• Records the appointment with name, phone and general reason.
• Sends a confirmation and a reminder before the appointment.
• Lets customers reschedule or cancel in the same chat.
• Hands cases that need human judgment to a person.

Step by step to get started

1. 1Connect your WhatsApp Business number.Wenzy uses Meta's official WhatsApp Business Platform. You also connect Instagram and Messenger if you receive requests there.
2. 2Set up services and durations.A dental cleaning, a haircut or a legal consultation take different times. Define each service with its duration and reference price.
3. 3Create each professional's calendar.Wenzy includes its own calendar: each professional has hours, breaks and blocked time. If you already work in Google Calendar, you connect the account and appointments sync.
4. 4Define confirmation and cancellation rules.Deposits, minimum cancellation notice and what to do with late arrivals. On the Clinic plan, Wenzy collects deposits with payment links.
5. 5Approve reminder templates.Reminders sent outside the 24-hour window use Meta-approved templates, and Meta bills each send to the business's own business portfolio.
6. 6Test with real customers.The 14-day free trial includes 300 messages. Review conversations, adjust replies and decide who receives handed-off cases.

What data to ask for

Name, phone number and general reason for the appointment are enough to book. In healthcare, avoid asking for diagnoses, results or medical records in chat: that information belongs in clinical software and the in-person visit. Wenzy is designed to book with those three data points.

How much it costs

Each additional professional costs US$12 per month, each additional location US$39 and each block of 1,000 extra responses US$25. Meta bills the business directly for WhatsApp templates, such as reminders, and, from October 1, 2026, also service messages (replies inside the 24-hour window).

Common mistakes when automating appointments

• Giving every service the same duration.
• Not deciding who handles handed-off conversations.
• Sending reminders too early or too late.
• Asking for sensitive data that booking does not need.
• Forgetting to update published prices and promotions.