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:     Can you tell me the best way to see the city ?  
 Person2:  Sure , I advise the sightseeing buses .  
 Person1:      Travel by the buses ? That sounds interesting .  
 Person2:  Yes of course.You can see the whole city on the bus . It's cheap as well as efficient .  
 Person1:      Oh , there comes the bus . 

1