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: Hello , are you interested in this Honda ?
Person2:Hi , I am just looking .
Person1: It's a good car .
Person2:What year is it ?
Person1: 1999 .
Person2:How about the mileage ?
Person1: 6,000 miles , all highway mileage .
Person2:What do you mean 7B
Person1: Highway miles are not as bad as local miles . They do not hurt car as much .
Person2:Oh , why such a high mileage ?
Person1: The owner was commuting everyday crossing the state line .
Person2:Okay . Does this car have a warranty ?
Person1: One month .
Person2:How do I make sure I am not buying a junk ?
Person1: You'll check it out anyway you want . You can take it to a garage .
Person2:How much is it ?
Person1: $ 5,900 .
Person2:I'll have to think about it .
Person1: Leave your phone number , and I will give you a call if the price gets reduced .
Person2:Okay .

Output: formal

Input: Consider Input: Person1: Hello !
Person2:Is that the box-office ?
Person1: Yes .
Person2:I'd like to book two tickets for the film ' Jane Eyre ' for this evening , please .
Person1: Just a minute please . Oh , I'm sorry , all the tickets for tonight have been sold out .
Person2:What a pity ! How about tomorrow evening ?
Person1: Oh , you're lucky , there are just two tickets left . Do you want to take them ?
Person2:Wonderful , I'll take them .
Person1: OK , your name and telephone number please .
Person2:Wang Min . Telephone number is 13811658 . Can I pick the tickets this afternoon ?
Person1: Yes , of course .
Person2:Thank you very much .

Output: informal

Input: Consider Input: Person1: Are you telling us a lie again ?
Person2:I will be hanged if I lying .
Person1: All right . But what was the trouble ?
Person2:My car run out of petrol .
Output: formal