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'.

Input: Consider 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 ? ? ! ! !

Output: informal

Input: Consider Input: Person1: Darling , this dress is for you . I hope you like it .
Person2:Oh , very beautiful . Thank you , Steven , I like it very much .
Person1: Your birthday is coming , and I think this dress suits you . Why not try it now ?
Person2:My birthday present ? I can't help telling you that I am a happy woman , darling . I will come back soon . ( Go to her bedroom and wear the new dress , then show it to Steven . )
Person1: It fits me exactly . How does it look like ?
Person2:It displays your slender figure , darling .
Person1: The most important thing is that you bought it for me . I am happy that you know my size and style .
Person2:Because you are my dear wife .

Output: informal

Input: Consider Input: Person1: Who's that ?
Person2:Saint Jude-he's the saint of lost causes . Like my cousin , Anna , who can't stop getting pregnant . She's a lost cause .
Person1: Is that your cousin in the back ?
Person2:Yep . She's always got a bun in the oven . She was pregnant before marriage-a real sin in the Catholic Church .
Person1: What about birth control pills ? Don't they work on Italians ?
Person2:Ha-ha . Birth control and abortion are four-letter words in my family .
Person1: And I heard that Italian men have very active libidos .
Output: informal