answer: #Person1# and #Person2#'s flight was delayed. #Person2# was in Beijing for a conference on space technology. #Person1# has been to many places in China for a tour.
documents: #Person1#: It's a terrible day, isn't it?
  #Person2#: Yes, it is. This is why our flight was delayed for 2 hours. My parents should be worried about me. They are waiting for me at London airport.
  #Person1#: Where did you come from?
  #Person2#: Beijing. I was there for a 2 weeks' conference on space technology.
  #Person1#: How interesting! I was there for tour. You see, I usually have a tour twice or 3 times a year.
  #Person2#: Really? Which places did you visit in China?
  #Person1#: Apart from Beijing, we went to Nanjing, Shanghai, Xi'an, Hangzhou, and Guangzhou.
  #Person2#: Did you enjoy it?
  #Person1#: Very much. It was one of the most exciting tours I've ever made. Was this your first trip to China?
  #Person2#: Oh, no. I go almost every year. Unfortunately, it's always on space related business. I haven't had time to visit tour sites.
  #Person1#: Oh, what a pity.