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:     I've been standing here since half past seven . Where on earth have you been ?  
 Person2:  I'm terribly sorry I'm late . I just couldn't help it .  
 Person1:      It's really very easy saying you're sorry .  
 Person2:  Look , just give me a chance . I can explain it . 

1