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:       are you looking for a course ?  
 Person2:yes , but I'm not sure which one to sign up for .  
 Person1:        what kind of program are you looking for ? Full-time or part-time ?  
 Person2:I have to work during the day , so I want to find a part-time course that I can do in the evenings .  
 Person1:        what kind of course are you looking for ?  
 Person2:I need to improve my English .  
 Person1:        do you want a one-to-one private tutor or a group class ?  
 Person2:I think a one-to-one course will be too expensive for me , so a group class would be fine .  
 Person1:        have you ever considered taking one of our online courses ?  
 Person2:I think I prefer face-to-face instruction better .  
 Person1:        that's fine . If you want , you can sign up for a pre-sessional interview .  
 Person2:what's that for ?  
 Person1:        one of our qualified teachers will interview you so that they can find a class that suits you best .  
 Person2:do you have a brochure about the course that I can take home to read ?  
 Person1:        sure . Here's a brochure about out English classes that meet in the evenings .  
 Person2:thanks . I'll read through it tonight and get back to you tomorrow to sign up for a course . 

informal