A: Excuse me. Do you have a single room?
B: Sorry. We're fully booked. The only room available at the moment is a twin room.
A: OK. I'll take it.
B: May I have your name, please?
A: I'm John Li.
B: How many days do you want to stay?
A: Five days.
A: Excuse me. My name is Jack Wu. I'd like to book a room.
B: Single or double?
A: What are the rates?
B: It's US$100 for a single and US$150 for a double.
A: I'll take a single for 3 days.
B: OK. Just come to the front desk at the lobby.
A: OK. I'll arrive tomorrow.
B: See you then.