answer: #Person2# helps #Person1# book a single room.
documents: #Person1#: Excuse me, do you have a vacancy?
  #Person2#: Let me see. Yes, we still have four left.
  #Person1#: Well, I would like to book a single room.
  #Person2#: How long would you stay?
  #Person1#: 5 days. From Feb. 13 to 18.