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 know which stop we get off at ?  
 Person2:  We still have more to go , I think .  
 Person1:      We've been on this bus for a while now .  
 Person2:  You're right .  
 Person1:      Should we have gotten off the bus already ?  
 Person2:  I don't think so .  
 Person1:      I thought you knew .  
 Person2:  Maybe we did miss our stop .  
 Person1:      Really ?  
 Person2:  I'm positive that we missed our stop .  
 Person1:      I'm never catching the bus with you again .  
 Person2:  My mistake . 

1