New aircrafts bought during interview w/ CEO

[Manny Pacman Pacquiao]

In the design(maybe in class diagram) i'm thinking of how should this fit in. My point is that FBN can already add(or plot) the new routes etc, except the flight number... ready to be queried when entered into the system. I think this is a business requirement once new aircrafts are bought.. just thinking along this line...