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'.
--------
Question: 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 .

Answer: informal

Question: Person1: I can't believe it , I had faith in Bob and he let me down .
Person2:I know what you mean .
Person1: Really ?
Person2:Yes , he did the same to me .

Answer: informal

Question: Person1: Where do you live , Kim ?
Person2:I live in an apartment downtown .
Person1: Oh , that's convenient , but ... how much crime is there ?
Person2:Not much . But there is a lot of traffic . I can't stand the noise sometimes ! Where do you live ?
Person1: . I have a house in the suburbs .
Person2:Oh , I bet it's really quiet . But is there much to do there ?
Person1: No , not much . In fact , nothing ever really happens . That's the trouble .
Person2:Hey . Let's trade places one weekend !
Person1: OK . Great idea !

Answer:
informal