answer: #Person1# wants to change a dress bought earlier to a size down. #Person2# is happy to help.
documents: #Person1#: Hello, I bought a China dress in your shop this morning. 
  #Person2#: Yes? 
  #Person1#: I bought one size up by mistake. 
  #Person2#: Oh, did you? 
  #Person1#: I wonder if you can change it to one size down. 
  #Person2#: Yes, of course. Will you come with receipt? 
  #Person1#: Then I'll come to your place later in the evening, and how late is your shop open? 
  #Person2#: Until 8 o'clock madam. We are looking forward to seeing you.