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'.

[Q]: Person1: I've brought a little dog for Alice , girls usually like looking after pets .
Person2:Thank you , but Alice is only a visitor here . I don't know if she'll keep it .
Person1: To tell you the truth , the dog isn't my real reason for coming . I want to ask Alice if she'd like to be my girlfriend .
Person2:Really ?
[A]: informal

[Q]: Person1: Mom , can you talk about the philosophy of life with me ?
Person2:You got me on that one .
[A]: formal

[Q]: Person1: Three other people started to bid . One called himself Buddhabuyer , so I knew he meant business . I raised my bid twice , but it kept going up .
Person2:How high did the price go ?
Person1: I don't know . I dropped out at $ 250 .
Person2:You didn't watch the end of the auction ?
Person1: No . It wasn't the super bargain I thought it was .
[A]:
formal