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: Steven , can you give us a summary about your work ? What do you get from your work ?
Person2:I have accumulated a wealth of practical experience in work as a chief advertisement designer . Moreover , I realized teamwork is the key to success .
Person1: Why do you think so ?
Person2:I think building team spirit among the coworkers is very important . I believe we can accomplish a miracle if we stick together .
Person1: Very good . Anything else ?
Person2:My advantage is that I have strong sense of responsibility . But I lack patience .
Person1: I must praise you for your modesty and diligence . What's your plan next ?
Person2:I will listen and learn more when I start my new job . I plan to become more professional in my field .
Person1: I've got to commend you ; you really did a good job .
Person2:Thanks for your compliment , but there is still plenty more to learn .

Ex Output:
informal

Ex Input:
Person1: Hi , charlie , are you busy this evening ?
Person2:Sorry , I'm afraid that I've got plans tonight .
Person1: What are you doing ?
Person2:I'm going to my parents ' house for my father's birthday .
Person1: How old is he today ?
Person2:It's his 50th birthday .
Person1: Well , wish him a happy birthday for me .
Person2:Sure thing . What are your plans for the evening ?
Person1: I was just thinking of going to a movie tonight .
Person2:Well , if you can wait until tomorrow night , I'll go with you then .
Person1: Sorry , I've got people coming over tomorrow night .
Person2:Sounds like this weekend just isn't going to work out for us .
Person1: Sounds that way . Maybe some other time then ?
Person2:Sure.Hey , I'm sorry , but I've got to get going .
Person1: Yeah , me , too . It's about time I made a move .
Person2:Say hello to your friends for me .
Person1: Likewise . See you later .
Person2:Bye !

Ex Output:
informal

Ex Input:
Person1: You did well on the math test .
Person2:Of course .
Person1: Don ' t you always fail in the math tests ?
Person2:Things were different this time . I sat by a math genius .
Person1: Huh ? You mean you snuck a peek at his test ?
Person2:B :: Come on ! I just took a glance .
Person1: Are you crazy ? You were cheating .

Ex Output:
informal