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: Hi ! How are you going ?
Person2:Fine , thank you . How are you doing this morning ?
Person1: Not bad . How about you ? Haven't seen you for a long time .
Person2:Yes . I've been to New York . I got back only yesterday .
Person1: Did you enjoy yourself ?
Person2:Very much . New York is such a nice place . Shall I show you some photographs ?
Person1: Thanks , I like looking at photographs . How nice ! Oh , I'm afraid I must be going now . I've got an appointment . Have a good day .
Person2:You too . I hope to see you soon . Goodbye .
Person1: Goodbye .

Ex Output:
informal

Ex Input:
Person1: Hey Lucas , how was your trip to Paris ?
Person2:It was wonderful , but I was so tired .
Person1: Did you go to the top of the Eiffel Tower .
Person2:Yes , that was the first thing we did . We went all the way to the top . There were visitorsfrom all over the world taking photos there .
Person1: What else did you see ?
Person2:Art galleries , cathedrals , statues , fountains , palaces , bistros , there's really too much to say .
Person1: You must have had a great time .
Person2:Yes , at the beginning we were all excited and had lots of fun . However , on the third day of travelling in the city , I felt sick I think I had something bad to eat but it passed by the evening .
Person1: Yes . you need to be careful with what you eat when you're abroad.sometimes new food might disagree with you .
Person2:On the fourth day , we went to taste the French cuisine . That was really fantastic . And no stomach problems .
Person1: That is great . Everyone says French food is wonderful .
Person2:You'll have to try for yourself some day .

Ex Output:
informal

Ex Input:
Person1: hey Ayden , I was wondering if you could do me a favor .
Person2:that depends . What is it ?
Person1: it's kind of a big favor . I'm absolutely flat broke , and I owe my landlady $ 200 . she's given me until Friday to give it to her , but I don't get paid until next Monday . Do you think you could loans
Person2:I'd love to help you out , but I'm a bit short on cash this month as well . I had to get a new engine put into my car , and that ate up my savings .
Person1: if you can't give me the full amount , a fraction of it would still help . I'll pay you back on Monday . I promise .
Person2:let's see , I've got about $ 50 to get me through the weekend . I can only spare about $ 20 . I would give you more if I had it , I just don't have much money to my name right now .
Person1: thanks a lot Ayden . Every little bit will help . Tell you what , if you aren't doing anything tonight , why don't you come over and have dinner at my place .
Person2:that'd be great . Thanks ! What time should I come over ?
Person1: how about at 6 pm ?
Person2:see you then !

Ex Output:
informal