instruction:
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: I used to think that Americans had so much money they didn ' t know what to do with it .
Person2:You did ?
Person1: Yes . But now I ' Ve learned differently . Now I have a more realistic opinion .
Person2:What do you think now ?
Person1: There are lots of jobs , and almost everybody works . There is a high standard of living . People earn a lot , but they spend a lot to live . So there isn ' t so much money after all .
Person2:But I still say Americans spend a lot more money on useless things than we Chinese do .
Person1: That ' s true . But Americans work hard for their money like we do . I don ' t know why our spending habits are so different .
answer:
formal

question:
Person1: Hi .
Person2:Hi , Mary , Hi , Ken I hate to bring this up , but that new stereo , system you got ...
Person1: Yeah ?
Person2:You were playing it very late last night .
Person1: Yeah ?
Person2:It kept me awake .
Person1: Oh , I'm sorry .
Person2:It kept me awake a couple of hours .
Person1: I'm so sorry , I .. I didn't realize it was that loud .
Person2:It was that loud , and it was pretty late , and check with Mary if you don't believe me .
Person1: It's true.It was a bit loud .
Person2:I'm very sorry . I didn't realize it . I promise I'll keep it down in the future .
Person1: Oh , it's no problem.It ' s OK.You know , it only happened once .
Person2:I am glad we've straightened everything out .
answer:
informal

question:
Person1: How time flies ! Why I always feel haven't enough time to work and study ?
Person2:Yes , I also felt that . I'm always busy , and have no time for rest . I don ' t know how to make use of time .
Person1: Maybe we should make a plan and list what we should do next , and follow it .
Person2:That's a good idea . And in this way we will know how we spend our time and spare a lot of time to do other things .
Person1: You are right . Let ' s stop idling around and do something .
Person2:Yeah , time is money . We really need to make good use of it .
answer:
informal