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:       Can I help you ?  
 Person2:Yes , I need to apply for a parking permit .  
 Person1:        Are you a professor ?  
 Person2:What ? Are you kidding ? I'm only 22 years old !  
 Person1:        Yes , I am kidding.But don't you know only professors and students with disabilitiescan apply for parking permits ?  
 Person2:Yes , I know . I have a disability.My hip was broken last year . And I can't walk well .  
 Person1:        Oh , I'm sorry . I didn't know .  
 Person2:It's alright . You didn't see me walk to the desk .  
 Person1:        Here is the application form . I also need to see your student ID and your permission letter from the university .  
 Person2:My permission letter ?  
 Person1:        Yes , the letter that certifies you have a disability.And it must certify your disability entitles you to a parking place .  
 Person2:I was told I should have the letter sent directly to your office .  
 Person1:        Yes . Or you can bring it yourself .  
 Person2:But I asked them to send it to you directly .  
 Person1:        Let me look in the file then . Maybe we received it .  
 Person2:My name is Derek Schneider , S - C - H - N - E - I - D - E - R .  
 Person1:        Yes , here it is.Alright . Then I just need your completed application form , and I will be able to process your request .  
 Person2:Good . I will sit over there and fill out the form . I will give it to you in a few minutes.Oh , by the way , can I apply for any parking lot I want ?  
 Person1:        The form has a map on the back . You may specify your top four choices.We will give a spot in the lot that has an opening .  
 Person2:I see . Thank you .  
 Person1:        You're very welcome . 

informal