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:     We thought you might like to participate in our rehearsal .  
 Person2:  I ’ m afraid I ’ m already booked up for next Sunday . But thank you just the same .  
 Person1:      That ’ s a pity . We can arrange another time hopefully . 

0