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 ? You want to leave early ?  
 Person2:  Yes . Can I ?  
 Person1:      Do you really need to ?  
 Person2:  Yes . Is it OK with you ?  
 Person1:      Is it important ?  
 Person2:  Yes . Do you mind ?  
 Person1:      You really have to ?  
 Person2:  Yes . Will you let me ?  
 Person1:      I guess so . 

1