Given the task definition, example input & output, solve the new input case.
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: Person1: Hey man , you wanna buy some weed ?
Person2:Some what ?
Person 1:Weed ! You know ? Pot , Ganja , Mary Jane some chronic !
Person2: Oh , umm , no thanks .
Person1: I also have blow if you prefer to do a few lines .
Person2: No , I am ok , really .
Person1: Come on man ! I even got dope and acid ! Try some !
Person2: Do you really have all of these drugs ? Where do you get them from ?
Person1: I got my connections ! Just tell me what you want and I ' ll even give you one ounce for free .
Person2: Sounds good ! Let ' s see , I want .
Person1: Yeah ?
Person2:I want you to put your hands behind your head ! You are under arrest !
Output: informal
Based on the conversation, we can see that there is a presence of exclamation which is not present in a formal discussion. Therefore this is an informal conversation

New input case for you: Person1: can I see your passport , please ?
Person2:is this line for non-residents ?
Person1: yes it is . Residents can queen up in the lines to my right .
Person2:Ok . Here's my passport .
Person1: what's the expiration date on your passport ?
Person2:I think it's soon , maybe in a few months . It was renewed in Beijing , so the new expiry date is on the last page .
Person1: I see . Yes , you'll need to renew your passport in a few months . Make sure you don't let it expire while you are in the UK .
Person2:I won't .
Person1: do you have anything to declare ?
Person2:no , I don't have anything to declare .
Person1: how long will you be staying in the UK ?
Person2:I'll be here for about a year .
Person1: what is the purpose of your stay ?
Person2:I'll be studying . I'm doing an MBA at Nottingham University .
Person1: where will you be staying ?
Person2:I have a housing contract with the university . I'll be in a dorm room on campus .
Person1: how do you plan on paying for your living costs and tuition fees while you are here ?
Person2:my father has already paid for that in advance . Here are the receipts .
Person1: ok . Have a good day . Here's your passport and documents back .
Person2:thank you very much .
Output:
informal