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:     Oh , hi , Lily . When did you get back from Canada ? 
 Person2:  Just last week . 
 Person1:      How was it ? 
 Person2:  Oh , I loved it . I only visited a couple of cities , you know . But I had a great time . 
 Person1:      Well , tell me . What are they like ? 
 Person2:  They ’ re nice . 

1