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 don't think much of the film .  
 Person2:But I think it wasn't too bad .  
 Person1:        Really ? Do you like the story ? It's sheer nonsense !  
 Person2:It's exaggerated . Actually this sort of thing happens to everyone . 

informal