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'.

Example Input: Person1: How about you , Chuck ? Where did you grow up ?
Person2:Well , I was born in Ohio , but I grew up in Texas .
Person1: And when did you come to Los Angeles ?
Person2:In 1978 . I went to college here .
Person1: Oh . What was your major ?
Person2:Drama . I was an actor for five years after college .
Person1: That's interesting . So why did you become a hairdresser ?
Person2:Because I needed the money . And because I was good at it . Look ! What do you think ?
Example Output: informal

Example Input: Person1: I hear you bought a new house in the northern suburbs .
Person2:That ' s right , we bought it the same day we came on the market .
Person1: What kind of house is it ?
Person2:It ' s a wonderful Spanish style .
Person1: Oh , I love the roof tiles on Spanish style houses .
Person2:And it ' s a bargaining . A house like this in river side costs double the price .
Person1: Great , is it a two bedroom house ?
Person2:No , it has three bedrooms and three beds , and has a living room with a twelve-foot ceiling . There ' s a two-car garage .
Person1: That ' s a nice area too . It ' ll be a good investment for you .
Person2:Yeas , when will you buy a house ?
Person1: Not untill the end of this year , you know , just before my wedding .
Person2:Right , congratulations .
Person1: Thank you .
Example Output: informal

Example Input: Person1: Hi , Kenji .
Person2:Hi , Debbie . Have a seat . How's it going ?
Person1: I'm OK . How are you doing ?
Person2:Pretty good . Listen ... have you heard about the new Thai restaurant over on University Avenue ?
Person1: Do you mean The Bangkok ?
Person2:That's the one . A bunch of us are going there for dinner tomorrow night.How about coming with us ?
Person1: Sure , I'd love to .
Person2:Great . I'll call and make reservations .
Person1: Any time after 6 o'clock is good for me.Oh ! I'm late ! I have a class .
Person2:All right . I'll call you tonight and tell you the time .
Person1: Great . Talk to you then .
Example Output:
informal