Definition: 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'.
Input:  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 . 

formal