Definition: You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. If the conversation begins with a question, label it '1' otherwise '0'.
Input:  Person1:     Are you free tonight ?  
 Person2:  Yes , I am . What's wrong ?  
 Person1:      Would you please go to a dancing party with me ?  
 Person2:  OK . No problem .  
 Person1:      As a matter of fact , I haven't danced for a long time .  
 Person2:  But it's said that you dance wonderfully well .  
 Person1:      Thanks for flattering me . I think you dance a lot , right ?  
 Person2:  No . Just occasionally .  
 Person1:      What are your favourite dances ?  
 Person2:  I love rumba and waltz .  
 Person1:      How about samba ?  
 Person2:  To tell the truth , I don't like it . It's too fast .  
 Person1:      Then I'll see you at six . Is that all right ?  
 Person2:  OK . See you then .  
 Person1:      See you then . 

1