answer: Mike broke up with Cathy but he thinks there's plenty of fish out there in the sea. #Person1# feels angry about it.
documents: #Person1#: Hi, Mike. Haven't seen you for a while. How's Cathy? 
  #Person2#: We are not seeing each other any more. 
  #Person1#: What happened? Did you break up? 
  #Person2#: Yeah. I got sick and tired of her nagging all the time. 
  #Person1#: Oh, I am sorry. Maybe you were just emotional at that moment. Do you think you guys can get back together? 
  #Person2#: I don't know. There's plenty of fish out there in the sea! 
  #Person1#: Oh, you are such a dog!