Detailed Instructions: 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'.
See one example below:
Problem: 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 !
Solution: informal
Explanation: 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

Problem: Person1: good afternoon ! Can I help you ?
Person2:could you show me where the Chinese-style clothing is located ? I want to buy a silk coat .
Person1: this way , please . Here they are . They're all handmade .
Person2:oh , they look nice . May I try that back one on ?
Person1: of course . The fitting room is right over there .
Person2:do you have a medium in the same color ? This one is a little tight .
Person1: I'm sorry . All the back of that size are sold out . Would you like a red one ?
Person2:ok , let me try it on . what do you think ?
Person1: oh , that suits you very well . Besides it is believed in China that the red color brings happiness and good luck .
Person2:really ? I'll take it , and I'm leaving here tomorrow . Is it possible for you to send one in black to me by mail when you gte it in ?
Person1: our pleasure . Please fill out this form , leaving your address and telephone number .
Person2:thanks . Who much would that come to ?
Person1: let me see ...
Solution:
informal