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:     I want to buy two tickets for tonight's concert . 
 Person2:  Sure . How do you like your seats ? 
 Person1:      Ordinary one , please . 
 Person2:  Ok , here are your tickets in Row 13 . 
 Person1:      I think they are too far from the stage . I want two in row 6 . 
 Person2:  That's fine . But you have to pay another $ 10 . 

0