answer: #Person2# and #Person1# find out they will be on the same train. #Person2# wants to go to the bathroom and requests #Person1# to keep an eye on #Person2#'s luggage.
documents: #Person1#: Excuse me, is this seat taken?
  #Person2#: No, I don't think so.
  #Person1#: Thanks. I am waiting for the train at 9:00 o'clock to Shanghai. Where will you go?
  #Person2#: What a coincidence! We are on the same train.
  #Person1#: Really? What is your seat number?
  #Person2#: No.5 on the second row, and you?
  #Person1#: I am on the third row No.10.
  #Person2#: Could you please keep an eye on my luggage? I want to go to the washroom.
  #Person1#: No problem.
  #Person2#: Thank you so much.