Provide the theme summaries for the following conversation: 

Michael: I was in no mood for talk 
Michael: I was unpleasantly surprised to find they were talking about me behind my back
Richard: Oh, I see
Richard: Leave it behind
Richard: Are you coming to a Christmas party though?
Michael: Still thinking
Michael: I don't want to give them any additional opportunity of gossiping 
Richard: You don't have influence on it
Michael: Yeah, maybe you are wright 
Richard: You see, now you are talking
Richard: How about before at my place?
Richard: With Monika and Sandra?
Michael: ...
Richard: Does it mean yes?
Michael: Yes, whatever...
Richard: Come on man, don't be such a jerk
Richard: We'll have fun
Richard: Just come and I'll arrange everything
Michael: Ok man
Michael: Thx
Richard: Ok settled then

Summary: 
They were gossiping about Michael. He will come to the Christmas party. He, Richard, Monica and Sandra will have a before at Richard's place. 