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:     Could you come and spend the weekend with us ?  
 Person2:  Oh , I'm afraid I can't . I've had a date already .  
 Person1:      That's too bad !  
 Person2:  Maybe some other time . 

0