answer: #Person1# wants to return the sweater because there's a run at the neck.
documents: #Person1#: I'm afraid I have to return this sweater. 
  #Person2#: May I ask if there's anything wrong with it? 
  #Person1#: You see, there is a run at the neck. 
  #Person2#: Oh, sorry. But do you want to change it for another one? 
  #Person1#: No, thank you.