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 , Mark ! Hi , do you have a minute ?  
 Person2:  Oh , I'm sorry , Nigel . I'm rushing to a meet right now .  
 Person1:      Sure , no problem . Can we fix a time to talk later ?  
 Person2:  Sure , but this week is crazy for me . Can we make it next Monday ?  
 Person1:      Ok , see you 10 o'clock next Monday !  
 Person2:  That's fine . See you then . 

1