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: Let's see if we forget anything .
Person2:Oh , we need an umbrella . The weather is so changeable in that area .
Person1: Yes , let's go . Lock the door , please .
Person2:All right .
[EX A]: informal

[EX Q]: Person1: Look ! It ' s the start of the Olympic Games .
Person2:So what ?
Person1: You want to watch , don ' t you ?
Person2:Not really . I couldn ' t careless about the Olympic Games .
Person1: Please yourself .
[EX A]: formal

[EX Q]: Person1: May I help you with something ?
Person2:I would like to return these books .
Person1: What happened to this book ?
Person2:I dropped it , and the cover tore off .
Person1: I ' m going to have to charge you for the damage .
Person2:How much ?
Person1: It ' s only $ 5 .
Person2:That ' s not too bad .
Person1: I know it ' s not .
Person2:Here ' s the money for the book .
Person1: Thank you for your payment .
Person2:You are very welcome .
[EX A]:
formal