In this discussion, we follow the typical sequence of Step for Visitors.
Step 1 : Travel Agent Staff registers the Customer details
Step 2 : Staff makes Airline Flight Reservation
Step 3 : Staff makes Hotel Reservation
Step 4 : Customer makes Payment
Step 5 : Customer gives Feedback

This is the Enterprise Data Model :-

These are the Subject Area Models :- Airline Reservations Car Hire Feedback for Services Hotel Reservations Payments Restaurant Bookings Services Barry Williams Database Answers Ltd. London, England January 7th. 2014

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