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:       What's the problem , Nada ? You look down in the dumps .  
 Person2:I don't know . My life is a big mess . Everything is so complicated .  
 Person1:        Come on , nothing can be that bad .  
 Person2:But promise me , you'll keep it a secret .  
 Person1:        Ok , I promise . So what's troubling you so much ?  
 Person2:I've fallen in love with my boss .  
 Person1:        Really ? Is he married ?  
 Person2:Bo , of course not . He is still single .  
 Person1:        Then what's your problem ?  
 Person2:I try to keep it to myself . But there is a lot of gossip about us .  
 Person1:        Oh , I see . Office romance tends to be the subject of gossip .  
 Person2:Worse still , he is trying to avoid me these days .  
 Person1:        Office romance is very tricky .  
 Person2:It gives me a lot of pressure and I feel depressed .  
 Person1:        Cheer up , Nada . You'll be fine . 

informal