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:     What'll it be today , sir ?  
 Person2:  Fill it up . Super Unleaded .  
 Person1:      Shall we check your oil and tires ?  
 Person2:  I just checked the oil myself , but you can check the tires .  
 Person1:      ( The attendants fill the tank , clean the windscreen , and add some air to the tires . ) All right , sir , that'll be $ 26.50 .  
 Person2:  I'll charge it . Here's my card . 

1