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 happen , John ?  
 Person2:  Nothing .  
 Person1:      Why do you look unhappy ?  
 Person2:  I ’ m rather disappointed at not being able to see my best friend off .  
 Person1:      Oh , cheer up . He ’ ll understand you . 

1