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's wrong with you ?  
 Person2:  My head hurts badly .  
 Person1:      How long has it been like this ?  
 Person2:  Since last night .  
 Person1:      Do you have a sleeping problem ?  
 Person2:  Yes , I even can't fall asleep these days .  
 Person1:      I think you'd better have a further exam , and before the result comes out , try to relax yourself and take the medicine before you sleep . It will help you to kill the pain and make you sleep well .  
 Person2:  Is it serious , Doctor ?  
 Person1:      When the result comes out , I will tell you about it . Remember , never be afraid or be too tired .  
 Person2:  OK , thank you , Doctor . 

1