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:     Hi ! How are you going ?  
 Person2:  Fine , thank you . How are you doing this morning ?  
 Person1:      Not bad . How about you ? Haven't seen you for a long time .  
 Person2:  Yes . I've been to New York . I got back only yesterday .  
 Person1:      Did you enjoy yourself ?  
 Person2:  Very much . New York is such a nice place . Shall I show you some photographs ?  
 Person1:      Thanks , I like looking at photographs . How nice ! Oh , I'm afraid I must be going now . I've got an appointment . Have a good day .  
 Person2:  You too . I hope to see you soon . Goodbye .  
 Person1:      Goodbye . 

1