Excuse me, may I change my room, please?
One of my friends is coming to stay with me for a couple of days.
I'd like to change my single room to a suite.
Please wait a second while I check the registry.
I'm sorry, sir. There is no suite available now. Would you mind having a double room instead?
I'd like to have a bigger room.
I'd prefer a room facing the beach.
I'll check whether we have a big room vacant.