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: Have you heard about Anlesen David ?
Person2:No , have they have another fight ?
Person1: No , they got engaged .
Person2:You must be joking.Those two .
Person1: Well , my dear . I didn't believe either.But got it straight form the horse's mouth.Davi called me this morning .
Person2:So when did this happen ?
Person1: Last weekend , while they were on the Sik trip .
Person2:Well , I believe it now , and when are they are getting marry ?
Person1: Next june .
Person2:I can hardly believe it .
[EX A]: informal

[EX Q]: Person1: How may I help you ?
Person2:I want to return this video .
Person1: Is that all you need ?
Person2:I also need to check these books out .
Person1: Anything else ?
Person2:That ' s everything .
Person1: I need your library card .
Person2:I have it . Here you go .
Person1: Do you need anything else ?
Person2:That ' s everything .
Person1: Your books are due back two weeks from today .
Person2:Thank you . Good night .
[EX A]: formal

[EX Q]: Person1: Excuse me , is this the Guyon Travel Agency ?
Person2:Yes , sir . What can I do for you ?
Person1: I want to travel to the ancient town in the south of China . Would you please tell me something about it ?
Person2:Sure . There's network of canals . And there are white walls , black tiles , small bridges , flowing rivers , flagstones roads , blue sky and white clouds . Few places have preserved the past like this place . Walking on the ancient road makes us back to our sense .
Person1: Wonderful . That's just what I expect , where is my first place if I go there ?
Person2:Zhouzhuang .
Person1: How long does the tour take ?
Person2:It's about two days .
Person1: what's the cost ?
Person2:It's about 300 yuan .
Person1: I know . Thank you very much .
Person2:That's all right . May you have a good trip !
Person1: Thank you .
Person2:My pleasure .
[EX A]:
informal