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 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 .

Ex Output:
formal

Ex Input:
Person1: How do you spend your free time ?
Person2:I read or go swimming , go shopping , usually . I run or play tennis or do something else like those to get some exercises to keep fit .
Person1: Are you introverted or extroverted ?
Person2:I wouldn't call myself extroverted . Sometimes , I enjoy being by myself very much . But other times , I like sharing activities with others too , especially during these last few years .
Person1: What kinds of sports do you like ?
Person2:I like almost all sports , and I enjoy both playing and watching . I especially like tennis and mountain climbing .
Person1: What kind of personality do you think you have ?
Person2:Well , I approach things very enthusiastically , I think , and I don't like to leave something half-done . It makes me nervous-I can't concentrate on something else until the first thing is finished .

Ex Output:
formal

Ex Input:
Person1: There are things that are actually even smaller than atoms .
Person2:What are those ?
Person1: They are the things that make up the atom , such as electrons and protons .
Person2:Is there anything that is smaller than electrons and protons ?
Person1: Of course there is . Things can be divided and broken down into indefinitely small parts if we can .
Person2:I really don't want to know about this . Physics gives me a headache .

Ex Output:
informal