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:     May I have my bill , please ? 
 Person2:  That's $ 20 in all . 
 Person1:      Well , I am afraid you have made a mistake . Would you check it again , please ? 
 Person2:  Let me see . I am terribly sorry , sir . That should be $ 18 . 
 Person1:      It doesn't matter . 

0