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:     What ? How could you forget to reserve the concert tickets ?  
 Person2:  I'm sorry . I forget all about it .  
 Person1:      How could you ? I reminded you just this morning .  
 Person2:  It's leap my mind . I really feel terrible about it .  
 Person1:      I have been looking forward to this performance all month .  
 Person2:  I'm really sorry I let you down . I'll make it up to you somehow . 

1