answer: #Person2# takes #Person1# to the post office and tells #Person1# where to buy a city map.
documents: #Person1#: Excuse me, could you tell me where the post office is?
  #Person2#: Post office? It's not far from here. Do you know Xinhua Road?
  #Person1#: I'm from the United States and this is my first trip to your city. I know nothing about the city.
  #Person2#: Oh, welcome to our city, I'll show you the road. Please follow me.
  #Person1#: Thanks, by the way, where can I buy a map of the city?
  #Person2#: Just at the gate of the post office. Look, the post office is just across the street.
  #Person1#: Thank you very much. Good-bye.
  #Person2#: Good-bye.