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: Could you explain the paper-making process to us - in very simple terms - please ?
Person2:Well , the pulp falls from a box onto the first part of the paper machine , which is basically a wire bed with large holes in it , where most of the water is extracted .
Person1: So , is it actually paper at this stage ?
Person2:Yes , it is . But we need to take out more water . So it then passes through a series of rollers , where more water is squeezed out . After that it goes through the dryers , which are at a very high temperature . The paper is then coated . And finally it's wound onto reels and cut down into smaller lengths .

Output: formal

Input: Consider Input: Person1: How do you like waltz ?
Person2:It's very nice , I like it very much .
Person1: May I invite you for the first dance ?
Person2:My pleasure . But I'm afraid I'm not much of a dancer .
Person1: In fact , I took up dancing quite recently , too .
Person2:Oh , really ? But you're doing the tango wonderfully well .
Person1: I'm glad you say so , you dance beautifully too . It's lucky that I got a partner .
Person2:Thank you for your compliments . It's just that you are a good leader . Do you like the samba and waltz ?
Person1: Yes . And what dances do you like best ?
Person2:Waltz is my favorite . I like it better than any other dances .
Person1: Oh , the music has stopped . Thank you for the dance .
Person2:My pleasure . Let's go and have a drink .
Person1: Fine .

Output: informal

Input: Consider Input: Person1: You'll soon graduate from your university . Do you have any plans for the future ?
Person2:I'm planning to go to graduate school , but I also want to find a job . Otherwise , I'll have nowhere to go if I fail the entrance exam .
Person1: Do you have a clear career path to follow ?
Person2:career path ? I'm not sure .
Person1: what kind of job do you want after graduation ?
Person2:I want to become a professor , a lawyer , an editor , a civil servant ...
Person1: wait ! You can't do so many things at the same time . What exactly do you want ?
Person2:I don't know . Do you have any advice for me ?
Person1: yeah , you should first decide what kind of career you really want , plan your career path , and then try your best to achieve your goal .
Person2:I think perhaps I need to buy a few years while I figure out about my career .
Person1: no , you can't waste your time wandering around . If you want a job that requires a higher degree or diploma , you should focus on your graduate school entrance exam ; if you want a job that needs working
Person2:thank you so much for your advice . I'll think it over .
Output: informal