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:       I need help finding a gift for my daughter .  
 Person2:Would she like a laptop ?  
 Person1:        That sounds like a good idea .  
 Person2:A Mac is a very popular brand .  
 Person1:        She mentioned a Mac . How much is it ?  
 Person2:A 15 - inch Pro model is $ 2,100 plus tax .  
 Person1:        That sounds like a great price . I'll take one .  
 Person2:This is a gift she'll cherish for years . How do you want to pay ?  
 Person1:        I'll use my VISA .  
 Person2:We're almost through . Just sign here , please .  
 Person1:        Just take it home and plug it in ?  
 Person2:She'll be online 20 minutes after she opens the box .  
 Person1:        She's going to be so pleased with this .  
 Person2:Remember us for all your computer needs . 

informal