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:     The band is pretty good . How do you like the music ? 
 Person2:  It's very nice . I haven't heard live music in a while . This is fun . 
 Person1:      Well , then , may I invite you for the next dance ? 
 Person2:  Of course . But I'm afraid I'm not much of a dancer ... 
 Person1:      Don't worry . I'm not much of a dancer myself . 
 Person2:  You're dancing so well . 
 Person1:      You dance beautifully too . 
 Person2:  When did you learn to dance ? 
 Person1:      In college . But I don't dance very often . What's your favourite dance ? 
 Person2:  It's hard to say . It depends . But I love the waltz . 

1