answer: Jackson is Catherine's friend and Janet is David's friend. They introduce themselves at Catherine and David's wedding.
documents: #Person1#: The food looks really delicious.
  #Person2#: Sure it is, the wedding ceremony is wonderful, too.
  #Person1#: The bride looks so happy today. Are you a friend of Catherine's?
  #Person2#: Yes, we were in the same class at college. How about you?
  #Person1#: I'm a close friend of David's. How handsome he is in wedding clothes today. Well, may I have your name please?
  #Person2#: Jackson. I'm working in Chengdu, but I worked in Wuhan a year ago, and you?
  #Person1#: My name is Janet. I'm living in Mianyang. Ah, life in Chengdu, is it exciting?
  #Person2#: But the traffic is too heavy. I admire your easy life here.