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 suppose you like cinematography and costumes and that sort of stuff ?  
 Person2:Yes , I do . The look of a picture is very important .  
 Person1:        I think sound is even more important ! Guns , bombs , sirens--that's what makes a movie exciting !  
 Person2:You wouldn't know a good movie even if it bit you on the nose .  
 Person1:        In my book , all a good movie needs is a chase scene and lots of things that blow up .  
 Person2:Enough ! If we don't finish the game , there won't be time for any movies tonight ! 

formal