reserve
The German word 'Reservieren' is used in the same way as the English word 'reserve'. It is used to set aside or book something for future use, such as a table at a restaurant or a seat on a flight. The word can also be used to express the act of keeping something in reserve, such as money or resources, for future use.
I would like to reserve a table for two.
This is a phrase you can use when you want to book a table at a restaurant. In this context, 'reservieren' means to book or to reserve a spot.
Can I reserve a room?
This is what you would generally say if you're trying to book a room at a hotel. 'Zimmer' is the German word for room and 'reservieren' is to reserve.
We need to reserve the flights in advance.
If you are planning a trip, this is how you would say that you need to book your flights ahead of time. 'Im Voraus' is the phrase for 'in advance' and 'reservieren' is the verb 'to reserve'.