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:     Hi , Mike . Haven't seen you for a while . How's Cathy ?  
 Person2:  We are not seeing each other any more .  
 Person1:      What happened ? Did you break up ?  
 Person2:  Yeah . I got sick and tired of her nagging all the time .  
 Person1:      Oh , I am sorry . Maybe you were just emotional at that moment . Do you think you guys can get back together ?  
 Person2:  I don't know . There ’ s plenty of fish out there in the sea !  
 Person1:      Oh , you are such a dog ! 

1