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: When in Rome , do as the Romans do , they say .
Person2:What do you mean ?
Person1: Roman is living in Rome , of course . And go to work by car , or bus , or on foot .
Person2:I think the Romans do what everyone else does .
Person1: Certainly .
Person2:And Roman really loves life . He knows how to enjoy himself .
Person1: Not always . But they like good meal .
Person2:Really ?
Person1: How can I go there to have a taste ?
Person2:By air of course .

Ex Output:
informal

Ex Input:
Person1: Nurse , I am sure to die soon . They just don't tell me the truth , I know .
Person2:But I don't think so . No one has ever said a word that you are to die , only yourself . That means you are not willing to die , right ? Actually , you are recovering and what you imagine as your worry is slowing down the treatment . Many cases worse than yours turned out to be hopeful and successful . You must be confident . Your condition is much better physically , but a little bi difficult mentally . The most important thing for you now is cooperation with us .
Person1: Is what you said really true ?
Person2:Of course . I am a nurse and a nurse tells the truth .
Person1: Thank you .

Ex Output:
formal

Ex Input:
Person1: Well , the way you drive , Jen ... I still don't think that's a good idea .
Person2:I really love this music . It's a compilation .
Person1: I know . It's a mix of all the latest songs .
Person2:And you got them off the Net ?
Person1: No . I recorded these from your Cds .
Person2:Well , thanks for asking for my permission ... Now hand it over and let me record !
Person1: I knew I shouldn't have shown you my new toy ...

Ex Output:
formal