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 ?  
 Person2:  I can ’ t find the book I want .  
 Person1:      Why don ’ t you try looking at the database ?  
 Person2:  I checked it already .  
 Person1:      Do we have it available ?  
 Person2:  It wasn ’ t there .  
 Person1:      I guess it is lost .  
 Person2:  Will you be getting another copy ?  
 Person1:      Yes , we will .  
 Person2:  Could you reserve a copy for me ?  
 Person1:      I can do that .  
 Person2:  That ’ s great . Thanks a lot . 

1