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 heard about Michael's new home ? It's in one of the poshest areas in this area .  
 Person2:Is he living in the new housing estate in Killington ?  
 Person1:        No , he's living in an old house in Warton .  
 Person2:Do you mean the one near the health centre on Old Slate Road ?  
 Person1:        That's the one .  
 Person2:His house must be worth millions ! That is one of the most beautiful areas in Oxford . The surrounding area is really peaceful , and getting into the city centre from there is very convenient . How can he afford that place ?  
 Person1:        He didn't buy it . His grandfather died recently and left him loads of money .  
 Person2:Did he know that his grandfather was so wealthy ?  
 Person1:        No one in the family expected to get a dime from him . It was quite a surprise .  
 Person2:What a lucky man .  
 Person1:        He still has a complaint though .  
 Person2:What's that ?  
 Person1:        He wanted to live right on a bus line , but he doesn't . so , if he wants to take a bus anywhere , he has to walk 1/4 mile to get to a bus stop .  
 Person2:The poor thing . It must be difficult being him .  
 Person1:        You can say that again . 

informal