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:     What can I do for you ?  
 Person2:  Yes . There is something wrong with my watch . It stopped several hours ago .  
 Person1:      Let me have a look . Oh , the watch ’ s battery is worn down .  
 Person2:  How much is a battery ?  
 Person1:      $ 50 .  
 Person2:  How long will it last ?  
 Person1:      About 2 years .  
 Person2:  Here is the money . 

1