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: Good morning . May I help you , sir ?
Person2:Yes . I want to make a remittance to New Delhi .
Person1: Do you want an international money order or a banker's draft ?
Person2:I'd like a banker's draft please . It's not really urgent .
Example Output: formal

Example 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 .
Example Output: informal

Example Input: Person1: Hey Annie , who is this picture of ?
Person2:Oh , that's my great , great , great , great , great , great , great grandfather .
Person1: I think you can say your seventh great grandfather ! Cutie ! What's his name ?
Person2:Peter Madsen . A great A if I do say so myself .
Person1: Nice pun . What is it you active about him most ?
Person2:He loved his family and his countrymen and his freedom .
Person1: He looks like a very personable man .
Person2:He was . He was friendly toward and showed concern for everyone he met .
Example Output:
informal