costumer presumably should read customer
a specific booking will have a specific (agreed) rate which may or may not be the same as the scheduled rate for that room or room type for that period
Id expect a table of rates
eg a single night, multiple night, weekend.
I'd expect rooms to be banded
ie
type 1 rates
type 2 rates
Id probably want to store the cusotmers credit details for a booking, or against damages / other charges
Id probably want some form of mechanism to store extra items such as food, drinks, whatever against a customer booking