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:       Good afternoon , ma'am . Can I help you find anything ?  
 Person2:No , thanks . I'm just looking .  
 Person1:        We have a special on these skirts this week . Would you like to try one on ?  
 Person2:No , thank you . I don't need any skirts .  
 Person1:        How about a blouse ? This one here is the latest fashion .  
 Person2:No , thank you .  
 Person1:        Why not try on this lovely pair of shorts ? I'm sure they'd look fabulous on you .  
 Person2:No doubt . Look , I'm just browsing . If I need your help , I'll let you know .  
 Person1:        Take a look at this dress ! Don't you think it's perfect for you , ma'am ? Uh , where are you going , ma'am ? Ma'am ? 

formal