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'.

[Q]: Person1: Come on , fellows.Let ' s enjoy my wife's cooking !
Person2:Em , it's delicious !
Person1: Thank you ! My wife likes cooking very much .
Person2:You're lucky .
[A]: informal

[Q]: Person1: Hello , Tom !
Person2:Hello , Steven !
Person1: How are you doing ?
Person2:Not bad . What about you ?
Person1: I'm just a little tired .
Person2:Why ?
Person1: I have a lot of work to do in the company recently .
Person2:How is your family ?
Person1: Pretty fine , thanks .
Person2:Where are you going now ?
Person1: I am going to buy a new air conditioner for my parents . Oh , it ' s two o ' clock . I must go now .
Person2:OK , see you next time .
Person1: See you .
[A]: formal

[Q]: Person1: When do we get off the bus ?
Person2:I think we have a while longer .
Person1: I feel like we've been on this bus forever .
Person2:That's true .
Person1: Are you sure we weren't supposed to get off already ?
Person2:I don't know .
Person1: I thought you knew where we get off at .
Person2:I wasn't really paying attention . I think we missed our stop .
Person1: Seriously ?
Person2:Yeah , we definitely missed our stop .
Person1: That's the last time I get on a bus with you .
Person2:My bad.sorry !
[A]:
informal