A Booking system python Program

I am working on building a complete sports centre management system. I need a python program for the booking service part of the system. The code must permit the users to book sessions from the website. The user should be able to book single or multiple sessions. The user can book a session only up to two weeks in advance. It should allow the user to book multiple sessions. If the user book 3 sessions or more in a 7-day period, they get a discounted price (Like 20%). The program will be storing and retrieving data from a database (data such as facilities, member id, availability etc.). No need to create the database, just that the program would be connected to a database.