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:       OK , so this is our newest machine . It was only installed last year .  
 Person2:What's the running speed of the machine ?  
 Person1:        About 1,500 metres per minute . It's one of the fastest in the world . We had a few problems with it after start-up but it's running very well now .  
 Person2:And what's the maximum output ?  
 Person1:        If we're running at full capacity , it's 160,000 tonnes per annum . 
answer:
formal


question:
 Person1:       What's your favorite hobby ?  
 Person2:I'd like reading books best .  
 Person1:        What kinds of books do you like to read ?  
 Person2:Literature and economy .  
 Person1:        By the way , would you like to see movies ?  
 Person2:That's OK .  
 Person1:        What do you do in your spare time ?  
 Person2:I like to play golf , play badminton or crack jokes .  
 Person1:        I just like to sleep like a lazy cat .  
 Person2:That's a bad habit . 
answer:
formal


question:
 Person1:       What are you reading ? 
 Person2:It ’ s an article about language . It talks about the idea of having a single global language . 
 Person1:        It seems that English already is the main global language . Does the article suggest that there should be an artificial language like Esperanto as the world language . 
 Person2:Actually , it suggest English . The main argument is that English is already being studied as a second language in most countries-china , India , mexico , Nigeria , Pakistan , and japan . So beginning again with a language like Esperanto would be wasteful . The second argument is that English is used in modern technology far more that any other language . Most emails are sent in English and the vast majority of website use English . 
 Person1:        Does the article say anything about other language ? How will they survive in an English-speaking world ? 
 Person2:The article points out that many languages have been lost and will be lost , but others will continue to be used for generation , even if English continues to be the dominant language . 
 Person1:        Right . All the people who speak Chinese . Hindi , French and Spanish aren ’ t suddenly going to stop using those languages . 
 Person2:Exactly . The article suggests that those languages will be used , but that they will only rarely be used in international communication between non-native speakers . 
 Person1:        In that case , I shall continue to learning a few basic phrases in other languages . 
answer:

formal


