answer: #Person2# usually has a birthday party prepared by #Person2#'s parents. #Person1# tells #Person2# the story of the song 'Happy Birthday'.
documents: #Person1#: When is your birthday? 
  #Person2#: August 1st. 
  #Person1#: Do you usually have a birthday party? 
  #Person2#: Yes, we do. My parents prepare dinner for me. 
  #Person1#: What would you do at the party? 
  #Person2#: We sing' Happy Birthday' at the party and have birthday cakes. 
  #Person1#: Do you know when people began to sing the song'Happy Birthday'? 
  #Person2#: Well, I don't know. 
  #Person1#: Let me tell you the story. In 1892, Patty Smith Hill and Mildred Hill wrote a song called' Good Morning to you'. But later someone added the words 'Happy Birthday' to their tune. 
  #Person2#: So the 'Happy Birthday' song has been popular since then? 
  #Person1#: Yes, actually, the song has been sung since its publication in 1932. People all over the world have sung it in many different languages.