Booking vs Reservation
Fleeting- External reference: https://thecontentauthority.com/blog/booking-vs-reservation
In general, booking refers to a confirmed arrangement for a service or product, while a reservation is a tentative arrangement that may or may not be confirmed later on. For example, you might book a hotel room for a specific date, while you might make a reservation at a restaurant for a future date and time.
— https://thecontentauthority.com/blog/booking-vs-reservation