answer: #Person1# couldn't find Clara by her previous address, so #Person1# didn't inform her about #Person1#'s wedding. Clara will buy a bunch of flowers as a present.
documents: #Person1#: Clara! How are you? I haven't heard from you for at least three years. What are you doing?
  #Person2#: I came back from Australia. Now I've opened a company. I heard from Miss Sue that you are getting married. Congratulations!
  #Person1#: Thank you!
  #Person2#: Why did you keep so quiet about it?
  #Person1#: I'm sorry. I mean to tell you. But I couldn't find you by your previous address.
  #Person2#: When will the wedding be?
  #Person1#: January 1st.
  #Person2#: I want to give you a present. What would you like?
  #Person1#: Let me see. Oh, a bunch of flowers will do.
  #Person2#: I see. Bye.
  #Person1#: Bye.