I have a doubt on the class Seats. I do not understand how Seats can be a class? It is a plural and does not make sense to model it as an object. In my opinion Seat can be modelled as an object instead of Seats.
This is something like modelling "Customers" as an object and which does not make sense. What is your opinion?
Srinivas, I agree with you that classes should be singular in a class diagram. However, it is just a name, and there seems to be a lot of 'slack' in what is acceptable for a class diagram. Ray