Definition of "Reservation" :

noun: the act of keeping back or setting aside for some future occasion

noun: the act of reserving (a place or passage) or engaging the services of (a person or group)

noun: an unstated doubt that prevents you from accepting something wholeheartedly

noun: something reserved in advance (as a hotel accommodation or a seat on a plane etc.)

noun: a statement that limits or restricts some claim

"He recommended her without any reservations."

noun: the written record or promise of an arrangement by which accommodations are secured in advance

noun: a district that is reserved for particular purpose