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:     Are you free on the thirteenth in the afternoon ?  
 Person2:  No I'm afraid not . I'm meeting Ruth then . How about the fourteenth in the morning ?  
 Person1:      I'm sorry . I'm attending a meeting at the Hilton then .  
 Person2:  What about the next day ?  
 Person1:      No . I'm busy then too . I'm meeting Dorothy Heath at North Bridge Road . Are you free on Thursday afternoon ?  
 Person2:  Yes , I think I am . Let's meet for lunch at mouth restaurant .  
 Person1:      Good idea ! Is two o'clock okay ?  
 Person2:  That's fine . See you there ! 

1