answer: Mr. Lewis's flying to Taipei by way of Hongkong and checks in at London Heathrow Airport with #Person2#'s assistance.
documents: #Person1#: Hello.
  #Person2#: Good morning, sir. Welcome to London Heathrow Airport. Where are you going?
  #Person1#: I'm going to Taipei by way of Hong Kong.
  #Person2#: Your passport and ticket, please. Will you be checking in any banks, Mr. Lewis?
  #Person1#: Just one and I have this carry-on bag.
  #Person2#: What kind of seat would you like, Mr. Lewis?
  #Person1#: Window, please.
  #Person2#: Your flight 923 will board at gate 35. It is 9 o'clock now and boarding will begin in 2 hours 30 minutes before the flight takes off. And here's your boarding pass. Have a good trip, Mr. Lewis.
  #Person1#: Thank you. Bye.