You are to develop a C++ code for an airlines online ticket booking system. The code should be user-friendly to allow the customer to easily initiate a new booking, view his existing booking, or cancel it. On the other hand, the code also allows the airline managers to add or update information on available flights, and perform other clerical tasks (like checking the number of bookings, passenger information, etc.). For simplicity, the code does not need to implement the functionality of a payment (just entering the PAY string is enough). The problem is very open- ended, meaning you can use any of the concepts learnt in the course to implement different additional functionalities to your code (and earn bonus points!). Use concepts like class inheritance, friend classes, constructors, private data, arrays, etc to add better structure to your code. For example, your definitions of Manager and Customer class can inherit from a Person class. The code should fulfill the following functionalities: Have 2 different levels of authentications; Manager and Customer. Both Manager and Customer should have the following attributes: name, user id, and password. Details of all registered users should be saved in a Users text file. All text files can be implemented as text files of mentioned names. Manager: o Manager can sign in and logout only. No sign up required for managers (these users should already exist in the users list). A sample managers name can be Umar Khan and the password is UM1234 o New flights are added to the Flights database by the Managers. The flight information should contain enough attributes to distinctly identify it. o A manager can access information about all flights listed in the system.

Customer: o Needs to sign up with a username and password. o Uses the credentials saved at sign up to log in and start a new session. o The session starts with the display of the customer console view, where he can view existing bookings, cancel a booking, or make a new booking. o A new booking is made on the available list of flights. Seats can be booked for multiple passengers in a single booking. All details on a new booking should be saved in the Booking file. o Customer should be able to cancel an existing booking from his console view. Make additional classes, as you deem necessary, to facilitate a proper functioning of the ticket reservation software. Additional points will be awarded to more interactive console screen designs.