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: 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 .

Output: informal

Input: Consider Input: Person1: Hi ! Ed , what's up ?
Person2:Nothing .
Person1: Doesn't look like it to me .
Person2:Just get out of my face !
Person1: Woo , easy .
Person2:Leave me alone !
Person1: What are you so ticked off about ?
Person2:I don't want to talk about it .
Person1: Maybe I can help .
Person2:I blew the finally exam .
Person1: You've got to be joking .
Person2:No , I'm not .
Person1: Well , don't get bend on a ship about it .

Output: informal

Input: Consider Input: Person1: Helen , you must be excited at going to America to study .
Person2:Yeah , I've been looking forward to it for ages .
Person1: What do your classmates think of it ?
Person2:They give me a lot of congratulations .
Person1: How long will you study there .
Person2:Oh , maybe three years . I will study and get the master degree first . Then I will decide whether I will stay there or come back .
Person1: Which university will you go to ?
Person2:Chicago University . My major is Economics .
Person1: Good luck !
Person2:Thank you !
Output: informal