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:       Hello , Grace . That's a beautiful skirt you have on . Where are you going ?  
 Person2:I am going to attend an interview .  
 Person1:        What kind of job are you applying for ?  
 Person2:My major is English . Of course I'll apply for an English teacher .  
 Person1:        Oh . That dress doesn't exactly match the job .  
 Person2:Why ? You said my skirt was beautiful just now .  
 Person1:        Yes , your skirt is really beautiful , but you are applying for a teaching position . You see , your skirt is very short , and your make up is too thick . What's more , the color of your lipstick doesn't match your skin . As a teacher , you should be a little more sedate .  
 Person2:Then what should I do ?  
 Person1:        Some of my friends tell me that being a teacher , the most important is the beauty of mind . You shouldn't pay too much attention to your appearance . You should appear frugal and prudent . Your experience and knowledge will gain the appreciation of your interviewer . 

informal