answer: #Person1# recommends several hats for #Person2#. #Person2# buys the pink one after bargaining with #Person1#.
documents: #Person1#: Can I help you?
  #Person2#: I want to buy a hat.
  #Person1#: Come here, please.
  #Person2#: Is this one fit for you? It is nice.
  #Person1#: I don't like the style.
  #Person2#: How about this one?
  #Person1#: Black is not my favorite colour.
  #Person2#: You must like this pink one, don't you?
  #Person1#: It's pretty. How much is it?
  #Person2#: Fifty yuan.
  #Person1#: It's too expensive. Can you come down a little?
  #Person2#: How about forty-five?
  #Person1#: I'll buy it if forty.
  #Person2#: OK.