To reserve a room in English, you can say "book a room" or "make a reservation for a room". These phrases come from the verb "to book", which means to arrange or set aside something in advance. Here are some examples with Chinese translations:

Can I book a room for tonight? 我能预订今晚的房间吗？

I'd like to make a reservation for a double room. 我想预订一间双人房。

Is it possible to book a room with a view of the city? 能预订一间能看到城市景观的房间吗？