Confirmations, reminders and cancellations
After booking, the visitor and the host each get an email with the details and a calendar file (.ics) link; the calendar data is also included at the bottom of the email. Reminders go to the visitor at the times you set per event type (default 24 hours and 1 hour before).
Each confirmation has a private manage link. Visitors can cancel or pick a new time up to your cancellation cutoff (default 24 hours before); after that they're asked to contact you. Cancelled bookings stop their reminders and free the slot.