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:     May I help you with something ?  
 Person2:  I would like to return these books .  
 Person1:      What happened to this book ?  
 Person2:  I dropped it , and the cover tore off .  
 Person1:      I ’ m going to have to charge you for the damage .  
 Person2:  How much ?  
 Person1:      It ’ s only $ 5 .  
 Person2:  That ’ s not too bad .  
 Person1:      I know it ’ s not .  
 Person2:  Here ’ s the money for the book .  
 Person1:      Thank you for your payment .  
 Person2:  You are very welcome . 

1