reservation
noun [ C ]
COMMERCE uk/ˌrezəˈveɪʃən/ usan arrangement to have something kept for you, for example, a seat on an aircraft or a table at a restaurant:
Do you have a reservation?
It is advisable to make a reservation several days in advance.
They prefer not to take reservations because it's less efficient if a table sits empty while they wait for a party to show up.
hotel/dinner/travel reservations
a reservation system