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:       Have you thought of moving at all , Sarah ?  
 Person2:We ’ Ve thought about it , but my husband and I can ’ t afford it right now . The only thing we could afford would be living in the slums , which is something I don ’ t want to do .  
 Person1:        Buying a house can be expensive , but there are ways to find cheaper houses .  
 Person2:Like what ?  
 Person1:        Well , sometimes the city auctions offer houses to the community . You ’ d have to make a quick decision about the offer in a day , but you would definitely save money doing it that way .  
 Person2:That ’ s a good idea . Do you know anyone who has done that before ?  
 Person1:        Sure , my sister-in-law and her husband just bought a house that way . They ’ re pretty satisfied with it .  
 Person2:Is the house pretty run-down .  
 Person1:        Not at all . The woman , who owned it , took good care of it . But when she died , she had no family left and no will , so the government had to sell it for her .  
 Person2:Was it a very old house ?  
 Person1:        It was about 75 years old . There were a few repairs that needed doing , but it didn ’ t take a lot of money or time .  
 Person2:Is it in a good location ?  
 Person1:        The area can be a bit rough in the evenings , but the neighbors watch out for each other , so it ’ s ok . 

informal