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:     What can I do for you ?  
 Person2:  I ’ m returning these books .  
 Person1:      Let me have them .  
 Person2:  Here are all of them .  
 Person1:      These books are two weeks late .  
 Person2:  I didn ’ t have time to return them .  
 Person1:      You ’ re going to have to pay late fees .  
 Person2:  How much ?  
 Person1:      25 cents a day .  
 Person2:  25 cents a day ?  
 Person1:      That means 25 cents for each late book .  
 Person2:  That ’ s expensive . 

1