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: Thanks for offering to give me a lift . I ' m looking forward to this party , but I didn ' t want to go alone .
Person2:Don ' t mention it . It ' s my pleasure . Have you been to one of these large , sit-down dinner parties since you got to New Haven ?
Person1: No , this is my first.Last week I went to a cookout for new professors at Dean Barksdale ' s home . I took a taxi because I didn ' t want to be late.But I was the first one
Person2:Cookouts often start slowly . A two o ' clock start means you arrive any time after two .
Person1: Thanks for telling me this .
Person2:I was late getting back from the mall , but I ' m hurrying .
Person1: Why are you in such a hurry ? They said , Dinner at eight , and it ' s only seven-fifteen . I don ' t want to be the first one there again .
Person2:Don ' t worry . We won ' t be the first .

Output: informal

Input: Consider Input: Person1: Who stands out in your mind as a man or woman of sound character ?
Person2:If I think of famous people , I think of Abraham Lincoln .
Person1: He's the US president , who walked five miles just to give a lady her change , isn't he ?
Person2:That's the one . He also was famous for never giving up on his goals .
Person1: That's right . He ran for office quite a few times before he was finally elected .
Person2:And I also admire him for his courage in fighting for equal rights .
Person1: He had great vision , didn't he ?
Person2:And humility . I would have liked to meet him personally .

Output: informal

Input: Consider Input: Person1: Excuse me . Is there any body here ?
Person2:Yes .
Person1: I've finished up all my water . I would kill for a sip of water .
Person2:Sure , come on in .
Person1: Thank you very much . Are you here alone ?
Person2:My father and sister are out to photographing . What about you ?
Person1: I'm a back-packer from America .
Person2:What is a back-packer ?
Person1: It means a hiker who loves traveling around the world .
Person2:Cool . You must have been to a lot of places .
Person1: Yes , actually almost half of all the countries over the world . I love traveling places .
Person2:So cool . I want to be a back-packer when I grow up .
Person1: You can do it . But do work hard on your English to make it easier .
Person2:I'll try my best .
Output: informal