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: Consider Input: Person1: I wish you wouldn't play the TV so loud .
Person2:Sorry . Were you trying to sleep ?
Person1: Yes , please ask when you want to borrow my records next time .
Person2:I'm sorry . You're right . I should have asked .

Output: informal

Input: Consider Input: Person1: I don't think much of the film .
Person2:But I think it wasn't too bad .
Person1: Really ? Do you like the story ? It's sheer nonsense !
Person2:It's exaggerated . Actually this sort of thing happens to everyone .

Output: informal

Input: Consider Input: Person1: Do you often surf the Internet ?
Person2:Yeah . I do it once a week .
Person1: Is it very interesting ?
Person2:Sure . I get a lot of information and make many friends .
Person1: Oh , I'll have a try .
Output: informal