answer: #Person2# returns a broken cellphone that turns off by itself. #Person1# refunds the money.
documents: #Person1#: How may I help you?
  #Person2#: I would like to return an item.
  #Person1#: What are you returning?
  #Person2#: I want to return this cellphone.
  #Person1#: Is there a problem?
  #Person2#: It's broken.
  #Person1#: What exactly is wrong with it?
  #Person2#: The phone turns off by itself.
  #Person1#: That's fine, but do you have your receipt with you?
  #Person2#: Yes, here it is.
  #Person1#: I'll refund your money right now.
  #Person2#: Thank you so much.