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'.

Example input: 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 !
Example output: informal
Example 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
Q: Person1: Hello , is everything alright ? Can I help ?
Person2:I have a Promissory Note , but it's not called that . It's a Bill of Exchange .
Person1: Similar to a Promissory Note , yes . I can deal with that for you right here . The difference between a Promissory Note and a Bill of Exchange is that this product is transferable and can bind one party to pay a third party that was not involved in its creation .
Person2:So , even if someone wasn't directly involved , they can become involved ? Like the bank you cash it in ?
Person1: That's right . We didn't issue it to you , but technically we are buying it from you . So , we become involved .
Person2:I see . Sorry about this , I'm new in this job and I've never even seen one of these before ! My boss just told me to come here and sort it out .
Person1: As long as you have all of the documentation we require you have nothing to worry about .
A:
formal