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:       What else should we do now after the floors are done and after the furniture is in ?  
 Person2:We need to redo the curtains and paint all the walls and ceilings .  
 Person1:        I'm the painter . You can be in charge of going to curtain shops to choose curtains . That will probably be pretty expensive too . Having good curtains made isn't cheap .  
 Person2:You mean we can't just buy curtains already made ?  
 Person1:        Absolutely not . The windows must be measured , and then the curtains need to be made professionally . So that will take a while . Maybe a month or so .  
 Person2:While the curtains are being made , I can start having people look at the kitchen . I can't stand that old kitchen . I won't be able to cook there . I don't want to use that electric stove .  
 Person1:        We need to find an interior decorating company to redecorate the kitchen . I believe in Portland there are shops that specialize in kitchen renovation . I will look in the Yellow Pages . I'd like a kitchen mostly in ivory and light green .  
 Person2:I agree . The colors must be soft and pleasant . You should feel comfortable when you cook our dinners .  
 Person1:        Me ? Cook our dinners ? Hah ! You will be cooking , dear . You will cook .  
 Person2:No , I don't think so . I'll be too busy having tea in our new tea room .  
 Person1:        Well , I suppose we'll have to hire a cook then . So you won't be able to afford any clothes next year .  
 Person2:And you'll have to sell your motorcycle . And your cameras . Right ?  
 Person1:        Maybe I'll cook once or twice a week . How is that ?  
 Person2:Four times might be enough . Not once or twice . 

informal