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:     May I help you , sir ?  
 Person2:  Yes , I have many things to buy . I would like to choose the cleaning milk first .  
 Person1:      All right . What is your type of skin ?  
 Person2:  Dry . That's my problem .  
 Person1:      You can use this . It has special effect for keeping your face moisturized . It has this lotion , as a gift attached .  
 Person2:  Sounds good . What about shampoo ? I would like to buy the product that prevents scurf .  
 Person1:      How about this one ? It is well-known for the effect of removing scurf .  
 Person2:  Is it a newcomer ?  
 Person1:      Yes , it is a new brand .  
 Person2:  I do not care the brand as long as it works well .  
 Person1:      Anything else ?  
 Person2:  I want to buy the toothpaste , the brand of Jiajieshi .  
 Person1:      Yes , here you are . 

1