You book your ticket and fly whenever you want.
Seriously though, Do not take this assignment as a real world implementation, it is not. It is a learning experience designed to see how well you can develop a small, imperfect, client-server application. Do not worry about details like that just be able to book a seat and fulfill the requirements of the project.
Keep it simple and and follow instructions to the tee and you will do well
Good Luck
Trevor