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: Congratulations , Vivian . You won the grand prize , again .
Person2:Isn't it just great ! I just knew I'd win !
Person1: You did ? How ? Did you wear red underwear again this year ?
Person2:Not only that !
Person1: Tell me ! Tell me ! What's your secret ? !
Person2:OK , OK . I'll whisper it to you , but you have to promise not to tell anyone !
Person1: What ? ! You did that ? ? ! ! !

Ex Output:
informal

Ex Input:
Person1: Hey , Vernassa . why be angry look ?
Person2:It's the new neighbor . I hate her guts .
Person1: I've never seen you so worked up . what did she do to you ?
Person2:She made another white crack about my clothes .
Person1: Are you sure she was trying to put you down ?
Person2:Of course , I am sure .
Person1: You shall go easy on her . she is new here .
Person2:Just how am I supposed to do that ?
Person1: You shall just take it in surprise .
Person2:I've tried , but she keeps pushing my buttons .
Person1: Try to pull it together , Vernassa . I am sure things will turn note , ok ?
Person2:I am not . she is no picnic .
Person1: Well . if you think I can help , let me know .
Person2:Thanks , Serena .

Ex Output:
informal

Ex Input:
Person1: Do you know anything about Dr . Miller's classes ?
Person2:Yes . Are you in his class ?
Person1: I'm thinking of taking his class next semester .
Person2:He really knew his stuff , but he graded hard . Would that be OK ?
Person1: Yes , I really need someone who is really good .
Person2:I didn't find it overwhelming to earn a good grade if you work at it . Can you do that ?
Person1: Maybe , but I'm not sure .
Person2:Man , this guy was so funny when he was teaching . I like that , don't you ?
Person1: No , that stuff isn't important to me .
Person2:Did you know that he is a fairly new teacher and very current in his field ?
Person1: I don't care about any of that .
Person2:We all are looking for different things in an instructor . I hope I've helped you .

Ex Output:
formal