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: Well , we've settled everything in connection with this transaction except the question of the mode of payment .
Person2:Because this order is a comparatively big one , we would like to pay by time L / C , say , 60 days L / C .
Person1: Payment by sight L / C is quite usual in international trade , and as a rule , we only accept payment by sight L / C .
Person2:But we have only moderate mean at hand . If you can do us a special favor this time and allow us to delay payment , we'd really appreciate it .
Person1: Accepting time L / C is unusual and I've never done it before , but we could consider your request . I'll phone our company to see what they say .
Person2:Thank you for your consideration . When will you let me know your answer ?
Person1: This afternoon .
Solution:
formal