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: Do you like a package tour or to travel alone ?
Person2:I prefer a package tour , and we don't have to worry about accommodation , meals or that sort of trivial demanding things .
Person1: I prefer travel alone . I'll have a lot of time lingering at one place .
Example Output: formal

Example Input: Person1: Thank god you showed up when you did ! He ' s insane ! Do you think we should call the police ?
Person2:Don ' t worry about it , I ' ll call my friend and have him take care of it . I can ' t believe he was stalking you all these years . What a nut job !
Person1: I know ! Well ... he said I ' m not pregnant . I ' m sorry if I got you all worked up over nothing . I want you to know that I didn ' t do it on purpose ...
Person2:Don ' t apologize ! From the moment I met you , not a day has gone by when I haven ' t thought of you.And now that I ' m with you again , I ' m ... I ' m just scared , Veronica . The closer I get to you , the worse it gets . The thought of not being with you , I mean , I just can ' t handle it ! We were made for each other , Veronica . You are my everything , my soul mate . What can I do ?
Person1: Just hold me ... I ' ll always be here for you , no matter what . And together , we can tackle whatever life throws at us . I believe in us , steven .
Person2:I ' m so happy to hear that ! I knew we belong together . I love you so much .
Example Output: informal

Example Input: Person1: Let ' s got out tomorrow night . We can go to a bar and try to find you a girlfriend .
Person2:I don ' t think that ' s a good idea . I am just not good with approaching someone and starting up a conversation .
Person1: Maybe you just need a few pick-up lines , you know , break the ice .
Person2:Pick-up lines don ' t work !
Person1: Come on ! You can just walk up to a girl and say " If you were a booger I \ ' d pick you first . "
Person2:What ? Come on ! That ' s just lame ! No girl would fall for that !
Person1: Fine , then you can say , " So there you are ! I ' Ve been looking all over for YOU , the woman of my dreams ! "
Person2:That ' s a good one ! I think that ' s pretty funny .
Person1: Yeah , so you make her laugh , you make a fool of yourself a little bit and then you buy her a drink .
Person2:Ok , how does this sound , " I was so enchanted by your beauty that I ran into that wall over there . So I am going to need your name and number for insurance purposes . "
Person1: Nice ! Let ' s go !
Example Output:
informal