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:       Hey . Steven . You have a large chunk of money , but why do you still live in the old flat , instead of buying a new villa ?  
 Person2:I like to live here and enjoy my neighbors ' company . And I don't think I should waste money just because I have much of it .  
 Person1:        But I found you always hate to part with your money . Look at the car you drive ; it's such a junker !  
 Person2:Oh , the car is old but still in good condition . I just think we should be thrifty , whether you are rich or not .  
 Person1:        But ... But ...  
 Person2:But what ? Just remember that thrift is not only a great virtue , but also a great revenue .  
 Person1:        Maybe you are right . 

formal