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: Will you bring our bill , please ?
Person2:Yes , certainly . I'll be back in a minute . Here you are
Person1: Thanks.Let me see . I think there's a mistake on the bill here.Would you mind checking , please ?
Person2:Of course , not.Let me check.Oh , you seem bo be correct .
Person1: How about tax and service charge ?
Person2:Only ten percent tax is included in the bill .
Person1: Then one hundred U . S . dollars covers everything , doesn't it ?
Person2:It sure does .
[A]: informal

[Q]: Person1: hey , Mary , what's up ?
Person2:not much . Last night I met this great guy at the bar and we had such a wonderful time that we decided to meet again tonight .
Person1: oh , that's exciting . What's this guy like ? Is he hot ?
Person2:well , I didn't think so at first . But as we started talking , I found his extremely funny and witty . I couldn't stop laughing at his jokes ! We have so much in common . We like the same teams , music , a
Person1: it seems you two are a good match . What qualities do you look for in a friend ?
Person2:there's nothing definite I think . I don't have a list or anything , but when I first meet somebody , I can usually tell whether or not that person is going to be a good friend . It seems I have radar h
Person1: well , that's something I've never heard of . But if you as me what I value most in a friend , I would have to say honesty .
Person2:I agree . You can't expect a close relationship with a dishonest person . Those are the people that will turn their back on you when you are in need .
Person1: yeah , I know . A friend in need is a friend indeed . I don't need fair-weather friends either .
[A]: formal

[Q]: Person1: Dad , I've finished my homework .
Person2:Well , what game do you want to play ?
Person1: Do you want to play poker ?
Person2:Do you know how to play it ?
Person1: I'll teach you .
Person2:OK . Teach me how to play the game .
[A]:
formal