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: Who do you think is going to get the Oscar for best actor ?
Person2:I have no idea . To be honest , I couldn't care less .
[A]: formal

[Q]: Person1: Do you surf online regularly , Joe ?
Person2:Of course . I stay online for four hours at least every day .
Person1: Are you crazy ? What are you doing four hours online ?
Person2:Millions of things . I surf the Net , check my e-mail , and most importantly , I chat with my friends .
Person1: Online chat ? Aren't you afraid of meeting bad people who pretend to be what they are not ?
Person2:No , I am not . And I love to meet new people in the chat rooms who share a lot in common with me .
Person1: It sounds interesting .
[A]: informal

[Q]: Person1: Excuse me . What time does the next train to London leave ?
Person2:At 10:30 .
Person1: Is it a direct train to London ?
Person2:Yes , it is .
Person1: OK . Two tickets to London , please .
Person2:Single or return ?
Person1: Single , please . How much in total ?
Person2:10 pounds .
Person1: Here you are . Which platform should I go to wait for the train ?
Person2:It's platform 5 .
Person1: OK . Thank you .
Person2:You are welcome .
[A]:
informal