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:       Do you like music ? 
 Person2:Well , it depends . 
 Person1:        Do you think the music is well-matched ? 
 Person2:No , I think the music is too fast . 
 Person1:        How about the words of the song ? 
 Person2:It sounds nice . 
 Person1:        I like it . Naturally it can arouse your feelings . 
 Person2:Yes , I think so . It's very emotional . 
 Person1:        Of course , and I also like the rhythms . 
 Person2:Full of energy and hope . 
 Person1:        Really . It's worth listening to and enjoying . 
 Person2:Certainly it is . It's worth an Academy Award . 

informal