Definition: You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. You are required to assign a label 'formal' if there is an absence of emotion and a presence of questions anywhere within the conversation. If such pattern is not found assign the label 'informal'.
Input:  Person1:       How can I help you ?  
 Person2:I'd like to buy some perfume for my girlfriend .  
 Person1:        Do you know what kind of scent she usually wears ?  
 Person2:She usually doesn't wear anything but a few drops of Chanel No . 5 . But I'd like to buy her a new Fragrance .  
 Person1:        OK , here are some of our most popular perfumes .  
 Person2:Which one would you recommend ?  
 Person1:        Personally , I quite like the new perfume from Clinique . It's a subtle flowery scent . What do you think ?  
 Person2:That smells great . I'll take one bottle , please .  
 Person1:        Would you like to buy any other cosmetics for your girlfriend ? We have a full range of products from cosmetics to skin cleansers and moisturizers .  
 Person2:It's OK . She normally just wears a little foundation and some loose powder , and I don't know what shade to buy .  
 Person1:        How about some lipstick ? Every woman needs a nice tube of lipstick .  
 Person2:She doesn't usually wear lipstick . She thinks it makes her nose look too big .  
 Person1:        How about some mascara ? That will make her eyes look bigger .  
 Person2:No , thank you . She has big enough eyes as it is .  
 Person1:        I know what she would like-some whitening cream .  
 Person2:No thanks . Western women usually try to make their skin darker , not lighter .  
 Person1:        Will that be all then ?  
 Person2:That will be all . You've been very helpful , thanks . 

informal