answer: Lily won a Chinese contest and gets a free trip to China as a reward. David congratulates Lily.
documents: #Person1#: David, I ' m going to China.
  #Person2#: Really? How did you get the chance?
  #Person1#: You know. I took part in the Chinese contest. I was the best and they gave me this reward. I don ' t have to pay for my trip.
  #Person2#: Congratulations. How lucky you are!
  #Person1#: Thank you. I ' m leaving tomorrow morning.
  #Person2#: I ' m sure you ' ll enjoy the trip. China is such a beautiful country.
  #Person1#: I ' m sure I will.
  #Person2#: Have a nice journey, Lily.
  #Person1#: Thank you, David.