answer: #Person2# is looking for a middle-sized red coat. #Person1# doesn't have it and recommends a blue one. #Person2# takes it.
documents: #Person1#: Good morning! What can I do for you, Madam?
  #Person2#: Good morning! I'm looking for a coat.
  #Person1#: What color would you like?
  #Person2#: Could you show me some? I'd like a middle sized red coat.
  #Person1#: Sorry. We haven't anything in your size.
  #Person2#: Do you have a smaller size?
  #Person1#: I'm sorry. The small size coats have just been sold out. What about the blue one? It looks nice and maybe fits you.
  #Person2#: Well, may I try it on?
  #Person1#: Yes, please.
  #Person2#: It seems nice on me. How much is it?
  #Person1#: 168 yuan.
  #Person2#: OK. Here is 170 yuan. You keep the change please!
  #Person1#: Thanks.