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:     Hello ? 
 Person2:  Good morning , Nathaniel . This is Leah calling from the International Student Office . 
 Person1:      Good morning . 
 Person2:  The reason I'm calling is because Ms . Collins will not be able to call you back until next week . 
 Person1:      Oh . I had hoped she would have called me back yesterday . 
 Person2:  She's terribly sorry about that . She had to leave the office suddenly and won't be able to return until next week . She hopes you understand . 
 Person1:      Is there someone else I can talk to ? 
 Person2:  She asked me to call you to book an appointment with someone else today . When are you free today ? 
 Person1:      Any time after 2 pm today would be good for me . 
 Person2:  Mr . Liu is available at 2:15 today . Will that work for you ? 
 Person1:      I'd prefer to speak with Ms . Fonda . 
 Person2:  I'm afraid she isn't available this afternoon . She has an opening at 11:30 this morning . Will that work for you ? 
 Person1:      That will be fine . 
 Person2:  Ok , we'll be expecting you at 11:30 then . See you then . 

1