answer: #Person1# helps #Person2# get the cheapest ticket in the off-season to London on American Airlines.
documents: #Person1#: Fair-Priced Fares, how may I help you?
  #Person2#: How much is a round-trip ticket to London?
  #Person1#: When did you plan to go, sir?
  #Person2#: In the second week of September.
  #Person1#: The second week of September is still in the high-season, so the cheapest tickets are $ 650. The high season lasts until the 15th, so fares after that date are cheaper.
  #Person2#: In that case, I'll go after the 15th. How much are the off-season fares?
  #Person1#: Our cheapest ticket is $ 550 on American Airlines.
  #Person2#: Okay, I'll take it. ( to be continued )