Need a booking bot for personal life coaching sessions with payment

I run a private life coaching practice and need a booking bot that lets clients schedule sessions themselves instead of going back and forth over messages. When someone opens the bot, they should be able to pick the topic of the session (career, relationships, personal goals, or something else), choose the format — in person at my office or online via video call — and select how often they want to meet: a one-time session, weekly, or biweekly. The bot needs to show my actual free slots pulled from a calendar I control, so nothing gets double-booked, and it should collect payment before confirming the appointment, since I've had too many no-shows with sessions booked on trust.

I also want the bot to send reminders before each session and give clients an easy way to reschedule or cancel within a set time window, without having to message me directly. For recurring clients, it should remember their previous topic and format so they don't have to fill in everything again next time. A short intake form before the first session would help too — a few questions about what they want to work on and any relevant background.

Requirements:
— topic selection (career, relationships, goals, other)
— format choice: in-person or online, with video link generation for online sessions
— recurring booking options: single, weekly, biweekly
— calendar sync to show real availability only
— payment collection at booking, before confirmation
— automated reminders and self-service reschedule/cancel
— returning-client profile with saved preferences
— short intake questionnaire before the first session