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:       Peter , listen to the lyrics of this song .  
 Person2:What's so special about this song ?  
 Person1:        It's from the musical that is so popular in New York right now . Do you like it ?  
 Person2:Not very much . It sounds too emotional to me .  
 Person1:        That's why it is so popular . It was recorded by Barbara Tutin . I've heard that when she sang this song on stage the opening night , she created quite a sensation .  
 Person2:I'm afraid my association with Broadway musicals is rather limited .  
 Person1:        Well , then , you need an introduction . The school drama club is putting on a musical production . How about going together ?  
 Person2:I have a better idea . Let's go to a jazz concert and I'll give you an education in jazz . 

formal