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:  Hello ?  
 Person1:      Can I speak to Li Hong , please ?  
 Person2:  Speaking .  
 Person1:      Hi , Li Hong.This is Alice .  
 Person2:  Hi , Alice.How are you ?  
 Person1:      Not bad.Li Hong , I am sorry that I can ’ t go to see Mrs.Brown with you tomorrow morning.My mother is ill . I must take care of her .  
 Person2:  I ’ m sorry to hear that.You ’ d better stay at home.After all , we can visit Mrs.Brown later  
 Person1:      OK.Bye - bye .  
 Person2:  Bye . 

0