answer: #Person2# wants to buy a small yellow coat for her sister but it's just sold out. #Person1# recommends a green one with 10% off.
documents: #Person1#: Good morning. Can I help you, ma'am?
  #Person2#: Good morning, I'm looking for a coat for my younger sister. Her birthday is coming. I want to give her a good coat. Could you show me some?
  #Person1#: How about this one?
  #Person2#: It's nice. I like it!
  #Person1#: Which color do you want?
  #Person2#: Blue is her favorite color, but I think she looks better in yellow. Do you have a yellow one?
  #Person1#: Yes, we have. Which size would you like, medium or large?
  #Person2#: Neither, I would like a small.
  #Person1#: Na, I'm sorry. All the small yellow coats have just sold out. What about the green one? It looks nice, too.
  #Person2#: OK. How much is it?
  #Person1#: 170 UN. I can give you 10% off.
  #Person2#: Great! Here is 155 UN. Please keep the change.
  #Person1#: Thank you, goodbye!
  #Person2#: Goodbye!