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:     How do you like waltz ? 
 Person2:  It's very nice , I like it very much . 
 Person1:      May I invite you for the first dance ? 
 Person2:  My pleasure . But I'm afraid I'm not much of a dancer . 
 Person1:      In fact , I took up dancing quite recently , too . 
 Person2:  Oh , really ? But you're doing the tango wonderfully well . 
 Person1:      I'm glad you say so , you dance beautifully too . It's lucky that I got a partner . 
 Person2:  Thank you for your compliments . It's just that you are a good leader . Do you like the samba and waltz ? 
 Person1:      Yes . And what dances do you like best ? 
 Person2:  Waltz is my favorite . I like it better than any other dances . 
 Person1:      Oh , the music has stopped . Thank you for the dance . 
 Person2:  My pleasure . Let's go and have a drink . 
 Person1:      Fine . 

1