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:     How do you like skiing , Pat ?  
 Person2:  I love it . All my life I wanted to learn to ski . Finally I took lessons last year .  
 Person1:      I suppose skiing is easy for you .  
 Person2:  No , quite the opposite . I thought I'd never stop falling down . Then all of a sudden I started skiing much better .  
 Person1:      I see . Do you ski often ?  
 Person2:  Every chance I get . On weekends I ski all day long . Sometimes I even ski at night .  
 Person1:      That sounds great .  
 Person2:  Oh , yes . The ski slopes are well lit . It's really nice to ski at night . Why don't you learn to ski ?  
 Person1:      Not on your life ! I know I'd break my leg  
 Person2:  Don't be so frightened . It's just a skill . 

1