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:       hey Ayden , I was wondering if you could do me a favor .  
 Person2:that depends . What is it ?  
 Person1:        it's kind of a big favor . I'm absolutely flat broke , and I owe my landlady $ 200 . she's given me until Friday to give it to her , but I don't get paid until next Monday . Do you think you could loans  
 Person2:I'd love to help you out , but I'm a bit short on cash this month as well . I had to get a new engine put into my car , and that ate up my savings .  
 Person1:        if you can't give me the full amount , a fraction of it would still help . I'll pay you back on Monday . I promise .  
 Person2:let's see , I've got about $ 50 to get me through the weekend . I can only spare about $ 20 . I would give you more if I had it , I just don't have much money to my name right now .  
 Person1:        thanks a lot Ayden . Every little bit will help . Tell you what , if you aren't doing anything tonight , why don't you come over and have dinner at my place .  
 Person2:that'd be great . Thanks ! What time should I come over ?  
 Person1:        how about at 6 pm ?  
 Person2:see you then ! 

informal