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'.

[EX Q]: Person1: Hello !
Person2:Is that the box-office ?
Person1: Yes .
Person2:I'd like to book two tickets for the film ' Jane Eyre ' for this evening , please .
Person1: Just a minute please . Oh , I'm sorry , all the tickets for tonight have been sold out .
Person2:What a pity ! How about tomorrow evening ?
Person1: Oh , you're lucky , there are just two tickets left . Do you want to take them ?
Person2:Wonderful , I'll take them .
Person1: OK , your name and telephone number please .
Person2:Wang Min . Telephone number is 13811658 . Can I pick the tickets this afternoon ?
Person1: Yes , of course .
Person2:Thank you very much .
[EX A]: informal

[EX Q]: Person1: Who did the stupid thing ?
Person2:Maybe it was Dick .
Person1: I don't think so . Dick has been on the ball and never does things like that .
Person2:Then it must be a naughty boy who did it .
[EX A]: formal

[EX Q]: Person1: What do you think of this suit ? Do I look good or what ?
Person2:You look great ! However , I think you are a little over dressed for dinner .
Person1: Didn't they say we're going to the Ritz ?
Person2:Yes , but not the Ritz Carlton , the " Ritz " is a pizza place with peanut shells on the floor .
Person1: In that case , let me make a quick change into my street clothes .
Person2:I'll wait right here for you Superman .
Person1: Ta da ! Let's go to the Ritz !
Person2:Can we go to the Carlton next time and can you wear that fabulous suit ?
[EX A]:
informal