instruction:
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'.
question:
Person1: David , I ' m going to China .
Person2:Really ? How do you get the chance ?
Person1: You know . I took part in the Chinese contest . I was the best and they gave me this reward . I don ' t have to pay for my trip .
Person2:Congratulations . How lucky you are !
Person1: Thank you . I ' m leaving tomorrow morning .
Person2:I ' m sure you ' ll enjoy the trip . China is such a beautiful country .
Person1: I ' m sure I will .
Person2:Have a nice journey , Lily .
Person1: Thank you , David .
answer:
informal

question:
Person1: Do you like the Harry potter books and movies ?
Person2:Not really !
Person1: Why not ? They are very fun and exiting .
Person2:Maybe , but I think they are just for kids .
Person1: No , that ' s not true . Many adults like the Harry potter books too .
Person2:Maybe they don ' t agree with my taste .
answer:
formal

question:
Person1: I have never seen so many flavors of ice cream in one place !
Person2:There certainly are a lot . Can you choose a favorite ?
Person1: Vanilla with toppings is my favorite .
Person2:Is there anything as good as a hot fudge sundae ?
Person1: No way ! Do you have a flavors you don't like ?
Person2:I don't like ice cream with too many different flavors in it .
Person1: I agree with that , it just doesn't work for me .
Person2:I saw garlic ice cream on the menu once .
Person1: I think that would be horrible !
Person2:I think I'll stick with a more traditional choice today !
answer:
informal