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:     Speed Airlines Reservation . May I help you ? 
 Person2:  Yes . Do you have any flight to Paris on 15th ? I want one leaving in the afternoon . 
 Person1:      Yes . Flight DP336 leaves at 15:16 . Is that all right ? 
 Person2:  Is it a direct flight ? 
 Person1:      No , Sir.It has an hour layover in London . 
 Person2:  Well , I don't think I want it . 

1