reservation
noun
1.
a district that is reserved for particular purpose
2.
a statement that limits or restricts some claim
3.
an unstated doubt that prevents you from accepting something wholeheartedly
4.
5.
the written record or promise of an arrangement by which accommodations are secured in advance
6.
something reserved in advance (as a hotel accommodation or a seat on a plane etc.)
Derived from:
reserve 7.