instruction:
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'.
question:
Person1: I never understand why these shops have so much liquor .
Person2:What do you mean ? It's because it's much cheaper to buy liquor duty-free .
Person1: But why ? Why don't people like to buy shirts duty-free ? Or shoes ? I just don't understand why it's always liquor .
Person2:Well , it's because in most countries liquor has a higher tax on it .
Person1: You mean liquor has a higher tax than other things ?
Person2:Yes , of course . Didn't you know that ?
Person1: No , I didn't . How high is the tax ?
Person2:Well , it is different in different countries.But it's because of the high tax that buying liquor duty-free is such a good deal .
Person1: Why would the government want to tax liquor so much ?
Person2:Liquor is considered a luxury item.And also , it is considered as something that isn't very healthy.So if people want to buy it , the government thinks it has the right to tax it .
Person1: That's why a lot of people buy cigarettes here too , isn't it ?
Person2:Of course . Cigarettes are also taxed very heavily .
answer:
formal

question:
Person1: do you like playing games ?
Person2:I like playing computer games , but I'm not really into board games .
Person1: how about individual games like the Rubik's cube or solitaire ?
Person2:the Rubik's cube is so difficult to solve that I think it should be banned !
Person1: if I taught you how to do it , I'm sure you could solve it .
Person2:how did you figure out how to slove the Rubik's cube ?
Person1: I didn't really have to figure it out . I just followed the instructions !
Person2:I had no idea there were a set of instructions . I thought everyone who could solve it were all geniuses !
Person1: hints are really important when you're solving puzzles . If you give me some hints about playing that PS2 game , I ' ll show you how to solve the Rubik's cube .
Person2:it's a deal .
Person1: do you remember , years ago , when everybody at the New Year's party had yo-yos ?
Person2:yeah . That was a strange party . Can you still do any of those yo-yo tricks ?
Person1: I don't know . I haven't tried yo-yo since that party !
Person2:I could never figure out how to use my yo-yo .
Person1: if you don't start when you're young , it's hard to get the hang of it .
Person2:let's get started with this game then .
Person1: ok .
answer:
formal

question:
Person1: I am going on my first date tonight . Can you give me some suggestions about what to wear ?
Person2:Well , I think you look very pretty in your polka dot purple dress with your hair piled at the rear . That makes you very graceful and mysterious .
Person1: Yeah , that's a good idea . Let me try it .
Person2:Remember to match it with your glittering star-shaped necklace . Very attractive on formal occasions .
Person1: Do I look more mature in the highheel shoes ?
Person2:Sure , more elegant and taller .
Person1: I shall wear light make-up instead of heavy . The face powder will lighten my skin color .
Person2:If I were your date , I would be so charmed by you .
Person1: Thank you .
answer:
formal