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:       Look at this , A Brief Introduction of Hollywood .  
 Person2:Hackneyed theme !  
 Person1:        What ? How much do you know Hollywood ?  
 Person2:Nearly everything .  
 Person1:        You are full of boasts . I can examine you by question and answer . What is Hollywood ? Where is it ? What is the function of it ?  
 Person2:Too easy questions . Listen carefully . Hollywood is the movie capital of the world.It is located in southern California . Many films have been made there , and the kinds have changed often .  
 Person1:        Not bad . What kind of film did it produce from the ready to mid 1930 ' s  
 Person2:Gangster movies . Movie-goers at that time could get a look at the people involved in crime and their violent activities by watching it .  
 Person1:        Mm . What came after that ?  
 Person2:After all that violence , people needed to laugh , so from the mid-to-late l940 ' s , many detective movies about policemen who solved crimes were made . Then came musicals .  
 Person1:        Pretty good . Please continue .  
 Person2:Right . By the mid - 50 ' s , this light-hearted genre was competing with films about more serious subjects . There was one kind that could be found throughout all of these years , and that was the , mm , the . . .  
 Person1:        The western films about America's cowboys , Indians and early settlers .  
 Person2:Come on .  
 Person1:        Since the early 1960 ' s , there are horror movies about people who encounter frightening , unnatural situations , and serious films such as documentarist about events that actually happened , and science fiction movies about possible friture and future worlds . Some people have also enjoyed watching psycho-dramas about the everyday problems that people have .  
 Person2:Any more ?  
 Person1:        Of course , no list of film would be complete without animated movies . These are especially popular among children . 

informal