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:     Did you tip the bellboy ?  
 Person2:  Yes , but I don ’ t think it was enough . He looked disappointed . I gave him three dollars .  
 Person1:      That sounds about right to me , fifty cents a bag . If they think you don ’ t know better , they ’ ll try to get more .  
 Person2:  It ’ s the same in Balloon . But I definitely think we over-tipped the cab driver . The fare was twenty dollars , and you gave him a five-dollar tip . That ’ s twenty-five percent of the total ! Too much !  
 Person1:      I disagree . He was polite and informative , and he drove smoothly . One should reward good service .  
 Person2:  I ’ ll sign for dinner and charge it to our room.Let ’ s see.The bill is one hundred dollars . That seems reasonable . How much tip should I leave ?  
 Person1:      Remember last month when we were in Europe ? Maybe Californians use that same system they add the waiter or waitress into the bill , so you don ’ t have to leave anything extra . 

1