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 .  
 Person1:      how about tango ?  
 Person2:  oh , I like it . It's such a beautiful dance , but I can't do it well . What about you ?  
 Person1:      Tango is my favorite . Anything but hip-hop or the foxtrot .  
 Person2:  thank you for the dance .  
 Person1:      my pleasure . Let's go and have a drink .  
 Person2:  ok . 

1