answer: #Person1# tells #Person2# that #Person1# has benefited a lot from #Person2#'s computer lecture. After retirement, #Person1# feels happy while learning computer and exchanging emails with #Person1#'s grandchildren. #Person2# thinks that giving lecture is a change of space after work.
documents: #Person1#: Hi. Very glad to meet you here.
  #Person2#: Hi. Have we met before?
  #Person1#: Aren't you the woman who gave the computer lecturer at the city library last winter?
  #Person2#: Yes, it's me. You look familiar. Were you there in my class then?
  #Person1#: Yes, sure. I'm so glad I took your lecture and I've benefited quite a lot from it.
  #Person2#: Thanks. It's also rewarding for me to do something meaningful in my spare time.
  #Person1#: Oh, I thought you were a IT engineer or something like an expert in this profession.
  #Person2#: Not exactly, but I know a bit about computer.
  #Person1#: I thought that it would be impossible for me to learn how to use a computer at my age, but now I'm exchanging emails with my grandchildren. They say I am learning fast and well. It's the happiest thing after my retirement.
  #Person2#: That's great. Giving a lecture after work is a good experience for me because that is a change of pace from my daytime job as a sales representative.
  #Person1#: That's right.