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:     Can you play tennis ? 
 Person2:  Yes , I can . 
 Person1:      It is interesting , isn't it ? 
 Person2:  Yes , it's very interesting . 
 Person1:      Can you teach me ? 
 Person2:  Sure . Take the tennis racket . Now , throw the ball up , and hit it with the racket . Like this . 
 Person1:      Let me try . Oh , I missed ! 
 Person2:  Throw the ball up high . 
 Person1:      High ? 
 Person2:  Yes , very high . Over your head . Then you will have time to hit the ball . 
 Person1:      Oh ! I hit it . 
 Person2:  Well done ! 
 Person1:      Thank you . I think I like playing it . 

1