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 would like to return this book .  
 Person1:      May I do anything else for you ?  
 Person2:  I would also like to check out this magazine .  
 Person1:      I can ’ t let you do that .  
 Person2:  Why is that ?  
 Person1:      Our policy doesn ’ t allow anyone to check out the magazines .  
 Person2:  What things am I allowed to check out ?  
 Person1:      You are only allowed to check out books or videos .  
 Person2:  I really need to check out this magazine .  
 Person1:      I ’ m sorry , but that ’ s our policy .  
 Person2:  That ’ s stupid . 

1