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:     Hello , Jason . Are you free this Saturday evening ?  
 Person2:  Yes . I have no plans .  
 Person1:      Would you like to Come to our barbecue ?  
 Person2:  Yes , that sounds wonderful .  
 Person1:      OK . See you then .  
 Person2:  But wait , wait , will there be food that is not meat ? You know . I'm a vegetarian  
 Person1:      Hey ! I didn't know that ! When did you become a vegetarian ?  
 Person2:  The other day , I decided that I needed to loose more weight so I am going to try to be a vegetarian . And you know what ? I don't miss the taste of meat .  
 Person1:      Relly ? That's amazing .  
 Person2:  Yes , it really is . After having vegetarian diet . I have much more energy , I need less sleep , I feel calmer . I can maintain an ideal body weight without worrying about how much I eat and I can think more clearly .  
 Person1:      Are you kidding ? I really don't think that you think less clearly on non-vegetarian diet .  
 Person2:  Yes , maybe . But I feel better since becoming a vegetarian . Maybe you could also have a try .  
 Person1:      Maybe I'll also have a try some day , but I'm afraid that it would be difficult for me to refuse meat .  
 Person2:  Maybe you would change your mind after having a vegetarian diet .  
 Person1:      We'll see . Anyway , I'll prepare some vegetarian food for the barbecue . See you then ! 

1