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:     Can I help you , sir ?  
 Person2:  Yes , I've been sitting here for a few minutes . I'm waiting for someone to put gas in my car .  
 Person1:      I'm sorry , sir . But this is the self-service pump .  
 Person2:  Self-service ?  
 Person1:      Yes . You must fill up the car yourself .  
 Person2:  Are you serious ?  
 Person1:      Yes . Are you traveling here ?  
 Person2:  Yes , I'm from Taiwan . I never heard of a gas station where you fill up your own car .  
 Person1:      In America , most gas stations are like this .  
 Person2:  Do I really have to do it ? I don't know how .  
 Person1:      Well , since this is your first time , I will do it for you.But next time , if you want a full-service gas station , you should look at the sign .  
 Person2:  What sign ?  
 Person1:      Under the sign for the gas station , there will be a smaller sign that says Self-Serve or Full-Service.And some gas stations have both.But if they have both , some pumps will be self-serve and some will be full-serve.You have to look at the signs .  
 Person2:  I see . 

1