A Booking's life begins with a "Booking creation", and ends with a "Booking end". In between, its "Booking life" consists of some "Booking events".
In between an Booking's definition and its end, Booking is subject to series of "Booking events". The iterative nature of "Booking events" is shown by the asterisk (*) in the upper right corner of that event's box. The set of events constitute Booking's "Booking life": "Booking Form is filled", "Room Schedule is filled with booking details ", "Reservation Diary is filled with booking details" and "Deposit is taken".