answer: #Person2# express gratitude to #Person1# and #Person2#'s friends. #Person1# thinks visiting as a great way to promote the friendship between them. #Person2# then leaves to catch the plane.
documents: #Person1#: Now, you are to board the plane. We're sorry that we haven't done much to help you when you stayed in China.
  #Person2#: I appreciate what you have done for me. Everything I have seen here has left a deep impression on me. I really don't know how to express my thanks to you.
  #Person1#: We are ready to help you.
  #Person2#: Will you be kind to say ' Thank you ' to Mr. Zhang and other friends for me?
  #Person1#: I'd like to. I'm sure your visit will help to promote the friendship and understanding between both of us. Welcome to China again.
  #Person2#: Of course, I will. Well, it's time for me to say goodbye. The plane will take off soon. Hope some day you will come to America for a visit.
  #Person1#: Thank you. I will if I have chance. Goodbye and happy landing!
  #Person2#: Goodbye!