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'.

[EX Q]: Person1: Just make yourself at home .
Person2:Thank you . You are cooking up a storm .
Person1: Wouldn't you like some more chicken ?
Person2:No , thank you . I'm afraid I can't take in anymore .
[EX A]: informal

[EX Q]: Person1: Good afternoon madam . What can I do for you ?
Person2:Hi . I want to check out . My room is 1005 .
Person1: OK . Please hold on a minute . So you checked in on Monday and stayed 3 nights in single room 1005 . Is that right ?
Person2:Yes . Can I have a look at my bill ?
Person1: OK . Here you are . If there are no questions , could we have your signature in the blank below ?
Person2:OK . I would like to have my receipt report , please .
Person1: Here it is . We are pleased to serve you here and we look forward to seeing you again . Wish you have a good day .
[EX A]: informal

[EX Q]: Person1: Good morning . I'd like to check out right now .
Person2:May I have your room number Sir ?
Person1: Room 103 .
Person2:Just a minute , Sir.Are you Mr Wang from China ?
Person1: Yes.Wang Bin .
Person2:Mr Wang , did you sign any bill in the last two hours in our hotel ?
Person1: No .
Person2:Have you used any hotel services this morning ?
Person1: No , I have not .
Person2:Here is your bill.It totals 3250 dollars .
Person1: All right . Can I pay with credit cards ?
Person2:What kind of card ?
Person1: American Express .
Person2:Yes , we do . Here is your bill and receipt .
[EX A]:
formal