answer: #Person1# says goodbye to Hanson. Hanson'll miss #Person1# and feels pity for being too busy to see #Person1# off.
documents: #Person1#: Hello, Hanson. Today I come to say goodbye to you, for I'm going back to London tomorrow.
  #Person2#: No, not so soon. Couldn't I persuade you to stay a couple of days more?
  #Person1#: Much as I wish to but I really can't. I've already booked the flight.
  #Person2#: I hope this won't be our last meeting.
  #Person1#: Of course not. You can come to London to visit me in future. And I also will come here if I have a chance.
  #Person2#: I will miss you.
  #Person1#: I will miss you, too. You're really a good friend.
  #Person2#: It's a pity that I'm too busy to see you off tomorrow.
  #Person1#: It doesn't matter.
  #Person2#: Take care of yourself and remember to keep in touch.
  #Person1#: I will.
  #Person2#: Goodbye and have a good flight.
  #Person1#: Thankyou. Goodbye!