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 morning , sir . May I help you ? 
 Person2:  Good morning . I'd like to pay my bill . 
 Person1:      OK . In cash or by credit ? 
 Person2:  In cash . How much is the total charge ? 
 Person1:      Five hundred and thirty yuan altogether including charges for service . 
 Person2:  Here you are . Thanks for your wonderful service . 
 Person1:      Not at all . Welcome again . 

1