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 ? This is Mike here . May I have a word with Grace ?  
 Person2:  She ’ s not at her desk at the moment . Is there any message I can give her ?  
 Person1:      Yes . Please tell her that tickets to Phantom of the Opera will be delivered in two days . My number is 6521684 0 , extension 236 .  
 Person2:  Ok . I ’ ll let her know as soon as possible .  
 Person1:      Thanks a lot . Bye . 

0