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'll tell you something that's good about action movies . The special effects are great !  
 Person2:But they are so silly ! They're not art !  
 Person1:        That's just your personal prejudice . Do you know who was the director of the movie Titanic ?  
 Person2:James Cameron , of course .  
 Person1:        Well , did you know he was also the director of The Terminator ?  
 Person2:Well , nobody's perfect ! 

formal