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:     Good evening , sir . What can I do for you ?  
 Person2:  Bourbon , please .  
 Person1:      How would you like your Bourbon , straight or on the rock ?  
 Person2:  With iced water , please .  
 Person1:      Here you are , sir . Bourbon with iced water .  
 Person2:  Thank you . Now how much do I owe you ?  
 Person1:      The bourbon is 15 dollars plus 10 % service charge . So the total is 16.5 dollars .  
 Person2:  That is OK . Here is 20 dollars and you can keep the change .  
 Person1:      Thanks a lot . 

1