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:     Have you bought another handset  
 Person2:  No , it is the original one .  
 Person1:      This is silver gray , while I remember your handset was black .  
 Person2:  I have changed a case for it .  
 Person1:      Can a handset case be changed ?  
 Person2:  Of course . That's why I bought this type . I can change its case frequently , so it is novel to use it .  
 Person1:      How many cases are accessible ?  
 Person2:  There are two more , one is orange and the other is pink . I have bought them all .  
 Person1:      It's really going to be fresh all the time . 

1