answer: #Person1# bought a China dress with one size up by mistake at #Person2#'s shop. #Person1# wants to change it.
documents: #Person1#: Hello. I bought a China dress in your shop this morning.
  #Person2#: Yes?
  #Person1#: I bought it 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 the 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, ma'am. We are looking forward to seeing you.