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 I help you ?  
 Person2:  Yes . I'd like to borrow these books .  
 Person1:      Just a second . I'll see if I can find them for you .  
 Person2:  Thanks .  
 Person1:      Here you are . You must return them within a month .  
 Person2:  What happens if I'm not finished with them in a month ?  
 Person1:      You can come in and renew them unless someone else has reserved them .  
 Person2:  OK . Thank you very much for your trouble .  
 Person1:      No trouble at all . So long . 

1