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 , madam ?  
 Person2:  Yes , I'm looking for a new winter coat .  
 Person1:      Have you any particular color in mind ?  
 Person2:  I don't know really . What's the fashional color this year ?  
 Person1:      Red is very popular .  
 Person2:  Good . Red suits me very well . It's a cheerful color , isn't it ?  
 Person1:      Yes , madam , I agree . What size are you ?  
 Person2:  Well , I used to be size fourteen , but I've put on a bit of weight recently , so may be sixteen .  
 Person1:      Here you are , madam . All these are sixteens .  
 Person2:  I quite like this one . How much is it ?  
 Person1:      It's $ 180 .  
 Person2:  Oh , that's too expensive . Aren't there any cheaper ones ?  
 Person1:      These are our cheapest coats , madam .  
 Person2:  Yes , I see . I'll take it . Here's $ 200 .  
 Person1:      Here's your change .  
 Person2:  Thank you . 

1