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: I can't believe it , I had faith in Bob and he let me down .
Person2:I know what you mean .
Person1: Really ?
Person2:Yes , he did the same to me .
[EX A]: informal

[EX Q]: Person1: Kevin ? Hi , it ' s Elizabeth . I have a big favor to ask you .
Person2:How big , Elizabeth ? Last time you said that , I ended up working overtime 3 nights in a row !
Person1: Well , I ' Ve got a huge load of typing and Mr . Blake has insisted I get it done by tomorrow afternoon .
Person2:All right , Elizabeth . But this is the last time .
[EX A]: formal

[EX Q]: Person1: Hi ! Dick . Where are you going ? You're in such a hurry .
Person2:Playground . We're having sports for today's outside class activities . All my classmates have already got there .
Person1: What are you going to play ?
Person2:Some of us will play basketball and some volleyball .
Person1: Enjoy yourself .
[EX A]:
informal