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 , long time no see . How have you been ?  
 Person2:  Oh , I've been fine , but I'm having some trouble with my son .  
 Person1:      Tell me all about it .  
 Person2:  Oh , he's 14 and in the past few months , he's become quieter and a bit secretive . He locks himself in his room and I think he's running around with the wrong crowd .  
 Person1:      Oh , I see . What makes you think that ?  
 Person2:  Well , he's become friends with a couple of older boys who are in a band . And one night last weekend , he came home really late , way past his curfew .  
 Person1:      Really ? What happened ?  
 Person2:  He told me that his friend's car broke down and they had to walk home .  
 Person1:      I see what you mean . I understand why you're concerned . Have you tried talking to your son about it ?  
 Person2:  I haven't yet . I just keep hoping it's just a phase he's going through .  
 Person1:      You may be right , but it doesn't hurt to find out more about what's going on in his life .  
 Person2:  You're right . I should talk to him . Sometimes , it's not easy being a parent . Thanks . It helps to get it off my chest . You're always so easy to talk to .  
 Person1:      I don't know about that , but my door is always open . Stop by anytime . 

1