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: Do you know how to go to the Fragrant Hills in Beijing ? I heard that they are very famous in China .
Person2:Yes . Especially in autumn , the red leaves of the maple trees make the whole mountain red .
Person1: That must be very beautiful .
Person2:Yes , it can make people feel as if they were in the land of fairies .
Person1: Really ? Have you ever been there ?
Person2:A couple of times .
Person1: Can you go there with me ? I'd like someone who is familiar with that area to go with me .
Person2:Sure . I'd be very glad to be your tour guide .
[EX A]: informal

[EX 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 .
[EX A]: informal

[EX Q]: Person1: I learned of the railway accident only this morning .
Person2:A really dreadful accident and many people were killed .
Person1: Is that true ?
Person2:Yeah , well , I fill you in one the details later .
Person1: Thanks .
[EX A]:
formal