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'.

Q: Person1: How nice these sunglasses are !
Person2:Yes , they are the latest designs . Would you like to try them on ?
Person1: I want to try on this pair .
Person2:The round shape pair ?
Person1: That's right .
Person2:I think it suits you well .
Person1: I agree , how much ?
Person2:120 yuan .
Person1: It's not expensive . OK . I'll take them .

A: informal
****
Q: 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 .

A: formal
****
Q: Person1: Have you ever found yourself in a situation when you have to lie to people who trust you ?
Person2:Do you mean lying to people for their good ?
Person1: Yes . Is it wrong to lie to them even if it is for their good ?
Person2:It's hard to say . I mean , how can you judge what's good for them ? Maybe it is best to tell them the truth no matter what it is .
Person1: But sometimes it is so hard to tell the truth .
Person2:I know . If you're sure the truth will do harm , maybe you can choose not to tell it .

A:
formal
****