answer: #Person2# wants to buy a sweater for her son. #Person1# asks #Person2# her son's age and height and gives some suggestions.
documents: #Person1#: Can I help you, madam?
  #Person2#: Yes. I'd like to choose a sweater for my son.
  #Person1#: I see. Do you have any ideas so far?
  #Person2#: Not yet. Can you give me some suggestions?
  #Person1#: Sure, madam. But may l know how old he is?
  #Person2#: Thirteen.
  #Person1#: And the height?
  #Person2#: About 158cm. He likes to wear loose-fitting sweaters.
  #Person1#: I see. How about this one? It's very fashionable and popular among teenagers.
  #Person2#: I don't think he'll like it. He prefers simple styles.
  #Person1#: How about this one then?
  #Person2#: The style is all right, but I'm not sure about the color. Let me think for a while.