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:     Excuse me , is this seat taken ? 
 Person2:  No , please feel free . 
 Person1:      Thanks a lot . 
 Person2:  Do you work in Shanghai ? 
 Person1:      Yes I do . How about you ? 
 Person2:  No , I'm a tourist . This place is amazing ! It's much bigger than I imagined , and much more exciting ! There's so much to see here . 
 Person1:      You can say that again ! It's much more modern than people imagine . Where are you from ? 
 Person2:  Um , well let's see ... I'm from Kansas originally . A much quieter and more peaceful place than here , that's for sure ! 
 Person1:      Uh huh ... 

1