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: Fred , can you tell me how I can open my QQ Zone ?
Person2:Click your right key of mouse and choose QQ Zone .
Person1: Well , I have to provide some of my information , right ?
Person2:Yep ! The nick name for your zone , address , gender and so on . Some of them are privacy , so you have the right to keep secret here .
Person1: All information is filled in and now I can design my zone .
Person2:You can choose one type to make it as your background , and then find a music player and put your favorite songs into it , so your visitors can enjoy the music after entering into your zone .
Person1: Now everything is OK . I can write my blog , right ?
Person2:Certainly .
Person1: ( Half an hour , Janice begins shouting excitedly . ) What's the matter with you ?
Person2:Look ! David gives his following-comment on my first blog . He is my first visitor .

Ex Output:
informal

Ex Input:
Person1: ... I knew it . I always knew you were a lesbian !
Person2:She's my roommate , not my date . The D-man , as in dork .
Person1: Haha . Still got that great sense of humor , I see . Here's my card . I sell used cars . A car from us is a car you can trust !
Person2:Alrighty then . Didn't you use to date Sheryl ?
Person1: Sweet little lassie . Yep , broke her heart when the D-man told her he couldn't be a one-woman guy .
Person2:Oh ? I heard she dumped you . Anyway , she's right over there . Oh , Sheryl !

Ex Output:
formal

Ex Input:
Person1: The trouble is not that . It is that he may suddenly remember something I promised him a couple of weeks ago , out of a clear blue sky . Then he complains that I have gone back on my words .
Person2:Does he do that with his Dad ? I mean , does he complain things to his father ?
Person1: He never does , and in fact , he seldom communicates with him .
Person2:But didn ' t you say that his Dad takes him under his wings ?
Person1: Yes , I did . He only takes side with him . He seldom asks what Dick is doing .

Ex Output:
formal