A)The man wants to reserve a room.
B)The man reserved a room some time ago.
C)The man has booked a room with no bath.
D)The man wants to buy a flat on the second floor.
原文：
M：Hello, my name is Carlson. I believe you have a room booked for me.
W: Carlsono Oh, yes, Mr. Carlson. It's a single room with a bath, on the second
floor. I hope it will suit you, sir.
Q: what does the conversation tell us?