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:     Good afternoon , madam . May I help you ?  
 Person2:  Do you have some new perfume ?  
 Person1:      I am sorry , madam . I didn't hear you . It's too noisy here . Could you please say it again ?  
 Person2:  Well , I wanna buy some new perfume .  
 Person1:      Would you please wait a minute ? I will get one for you at once .  
 Person2:  That's all right .  
 Person1:      Here you are .  
 Person2:  Can I open it ?  
 Person1:      Yes , certainly , madam .  
 Person2:  It smells sweet .  
 Person1:      Yes , it is . This perfume just arrived yesterday , and it's the latest products of Chanel .  
 Person2:  Really ? How much is it ?  
 Person1:      55 dollars , madam .  
 Person2:  Ok , I will take two bottles .  
 Person1:      Thank you . Do you need something else ?  
 Person2:  No , thanks . 

1