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:       You're not looking happy.What ' s the matter ?  
 Person2:Oh , nothing special . I'm just a bit tired .  
 Person1:        With the job ?  
 Person2:With everything , with everybody , with all this !  
 Person1:        A good suggestion for you.You need a holiday .  
 Person2:It wasn't always like this , you know .  
 Person1:        What do you mean ?  
 Person2:Well , I mean.We always do the same thing.There ' s no variety in our lives .  
 Person1:        You need a holiday.That ' s what's the matter .  
 Person2:Certainly , perhaps . 

informal