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:     Do you have any seat preferences , sir ?  
 Person2:  Yes , could you put me in the non-smoking section ?  
 Person1:      Yes . Would you like a window seat ?  
 Person2:  If one's available , please . But not over the wing . 

1