TASK 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'.
PROBLEM: Person1: Thanks for the pizza . It was delicious .
Person2:It's okay .
Person1: Next time , it's on me .
Person2:Don't be silly .
Person1: I'm serious .
Person2:Alright . Next time , we can try some other flavors .
Person1: Certainly . The vegetarian pizza looks pretty good . It must be very delicious .
Person2:Definitely . I really like Italian food .

SOLUTION: informal

PROBLEM: Person1: Professor , can you help me add your class ?
Person2:You have to bring me an add sheet to sign . Do you have one ?
Person1: No , I will have to get an add sheet .
Person2:You must take the signed add slip to the Admissions and Records Office to add the class . Do you know where that is ?
Person1: No , I don't know where that is .
Person2:The office is in front of you as you cross the quad . The signs in the hallway will tell you where you need to be .
Person1: I think I can find it .
Person2:You'll find it easily . Make sure you add the class and then we will look at the roll sheet later to make sure that you were added on .
Person1: Thank you for letting me add your class .
Person2:To drop a class , you need to do the same thing with a drop slip . Good luck !

SOLUTION: formal

PROBLEM: Person1: That sounds pretty good . But isn't downloading music illegal ?
Person2:Not if you pay for it . For example , if you download from iTunes and pay with your credit card , it's legal .
Person1: OK , I'm going to get iTunes and download some Vanilla Ice songs .
Person2:Awesome . You'll see that they are really catchy .

SOLUTION:
informal