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: William , do you like studying English ?
Person2:I like studying English , and I can read well , but speaking can be difficult .
Person1: It's not that bad . If you talk to your American friends every day , you'll learn quickly .
Person2:Can I ask you a question ?
Person1: Sure , what do you want to know ?
Person2:I have my book from class here . How do you say this word ?
Person1: Laptop .
Person2:Sorry , I don't understand . What does that mean ?
Person1: A laptop is a type of computer that you can carry with you . Do you understand ?
Person2:Yes , I think so . Can you say it again ?
Person1: Laptop .
Person2:Laptop . Did I pronounce that correctly ?
Person1: Yes , that's right . That's very good .
Person2:Thanks . And this word ? How do you pronounce this ?
Person1: That word is pronounced kitchen .
Person2:Thanks so much . You're a good teacher .
Person1: Thanks .
Example Output: informal

Example Input: Person1: Please excuse me , but I really have to be going .
Person2:Yes , of course.It was nice to see you .
Person1: It was nice to see you , too.And please give my regards to Mrs.Robbins .
Example Output: informal

Example Input: Person1: Okay Rebecca , well I think you ' Ve given me a clear impression of your positive qualities , but let ' s talk a little bit about your weaknesses .
Person2:Okay , well it ' s always more difficult to describe them isn ' t it ?
Person1: Definitely , but if you had to pinpoint one weakness what would it be ?
Person2:Well as I mentioned before , I do tend to get frustrated if I don ' t see progress in my work or career . I suppose I ' m quite a restless character . My father always taught me to be a high achiever .
Person1: So would you say if things don ' t go your way at work it could easily get you down ?
Person2:Well , in a way yes . But I must say that even if I ' m not completely happy in my work I always give 110 % I would never shirk my responsibilities . I suppose sometimes I expect too much too soon .
Person1: Well , you know journalism is a highly competitive world , so you do need to keep pushing yourself it ' s true . Okay , well let ' s move on to talk about the job position here , shall we ?
Person2:Yes , please .
Example Output:
formal