answer: #Person2# wants to buy a sweater but is not satisfied with those #Person1# recommends.
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.