answer: #Person2# wants to buy a dress at #Person1#'s shop. She wants to pay by Visa but it's rejected, so she pays with her MasterCard.
documents: #Person1#: Good afternoon, miss, can I help you?
  #Person2#: Yes, I'd like to buy this dress, please.
  #Person1#: It's certainly a pretty dress. I can ring you up at the register over here.
  #Person2#: Great.
  #Person1#: Will you be paying by cash, check, or credit card?
  #Person2#: I want to use a credit card. Do you take Discover?
  #Person1#: Sorry, no. We only take MasterCard or Visa.
  #Person2#: I'll put it on my Visa card, then.
  #Person1#: Very well, ma'am. Oh, there seems to be a problem, it says it's rejected.
  #Person2#: There must be something wrong with the system. Try my MasterCard.
  #Person1#: Alright. Thank you. Yes, it seems to be working fine. Your total is $ 199. 00, sign here, please.
  #Person2#: Sure.
  #Person1#: Here you go, and here's your receipt. Have a nice day.
  #Person2#: Thanks. You have a good one, too.