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:       Shall we go to cinema this evening ? The new blockbuster starring mel gibson is showing . It ’ s supposed to be really good . 
 Person2:What kind of movie is it ? I don ’ t like many of his movies , actually . 
 Person1:        It ’ s a thriller . It has Julia Roberts playing the female lead . 
 Person2:I like thrillers and I like Julia Roberts , so it might be interesting . I read a review today and the critic didn ’ t seem to be very impressed . 
 Person1:        What did the critic say ? 
 Person2:He didn ’ t say it was bad , but he said that it wasn ’ t as good as it could have been , particularly as there were some good actors and actresses in it . 
 Person1:        The movie starts at eight o ’ clock , so we have plenty of time to eat and get ready . 
 Person2:Good . Dinner is nearly ready and I ’ d like to watch the news before we go . The Oscars were last night and I want to see the results . 
 Person1:        I won ’ t spoil your enjoyment by telling you who won . There were a few surprises . 

formal