answer: #Person1# comes to pick up #Person1#'s laundry. #Person1# checks the laundry and finds a button missing and a stain on the shirt. #Person2# sews the button back but cannot get off the stain. #Person2# apologizes and gives #Person1# a membership card.
documents: #Person1#: Hi, I come to pick up my laundry. This is the invoice.
  #Person2#: Here you are. We've ironed them for you already. Please check and see if there is any damage.
  #Person1#: I'm afraid that a button is missing.
  #Person2#: I'm terribly sorry. You know we are so busy today and we forget to sew the button back on. Please wait a moment. It will be ready soon.
  #Person1#: OK, please.
  #Person2#: Would you like to have a look? Is it to your satisfaction?
  #Person1#: Well, oh my God, there is another problem, I'm afraid. There is still a stain on the shirt.
  #Person2#: It doesn't seem like that. Sorry, sir, we've tried everything, but we're not able to get it off the shirt. It was from the sugar I think.
  #Person1#: It's been several days now, I am not sure.
  #Person2#: Yes, the sugar was burnt during the dry-cleaning process. And there you go.
  #Person1#: Oh, that's so bad. I know little about that. Is there a remedy for it?
  #Person2#: I am awfully sorry. Please tell us about the stains before the dry-cleaning next time.
  #Person1#: OK, I will.
  #Person2#: This is a membership card. You can get a 20 percent discount next time.
  #Person1#: Thanks a lot.
  #Person2#: Hope to see you again. We will provide the best service.