answer: #Person2# tells #Person1# where the boarding gate for transfer passenger is.
documents: #Person1#: Hi, Madam, I'm new here, could you tell me where is boarding gate?
  #Person2#: What's your flight number?
  #Person1#: Wait a second, please. Oh, it's CA193.
  #Person2#: Are you a transfer passenger, sir?
  #Person1#: Yes.
  #Person2#: Then the north line is the right track for you to take.
  #Person1#: It's so nice of you.