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'.

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 .
formal

Person1: Who will meet you at the airport ?
Person2:No one .
Person1: Oh , then I will arrange one of my staff to meet you at the airport .
formal

Person1: Good afternoon , madam . May I help you ?
Person2:Do you have some new perfume ?
Person1: I am sorry , madam . I didn't hear you . It's too noisy here . Could you please say it again ?
Person2:Well , I wanna buy some new perfume .
Person1: Would you please wait a minute ? I will get one for you at once .
Person2:That's all right .
Person1: Here you are .
Person2:Can I open it ?
Person1: Yes , certainly , madam .
Person2:It smells sweet .
Person1: Yes , it is . This perfume just arrived yesterday , and it's the latest products of Chanel .
Person2:Really ? How much is it ?
Person1: 55 dollars , madam .
Person2:Ok , I will take two bottles .
Person1: Thank you . Do you need something else ?
Person2:No , thanks .
informal