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 , Bob ! How are you doing ?  
 Person2:  Fine ! How are you ?  
 Person1:      I'm fine too , thank you .  
 Person2:  I've come to tell you I'm going to the concert this evening.Will you come with me ? I've two complimentary tickets .  
 Person1:      With the greatest pleasure.Where is the concert this evening ?  
 Person2:  It will be held at the Music Hall .  
 Person1:      What's on the program ?  
 Person2:  It's a piano recital . I'm fond of piano , you know . 

1