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:       Where do you live , Kim ?  
 Person2:I live in an apartment downtown .  
 Person1:        Oh , that's convenient , but ... how much crime is there ?  
 Person2:Not much . But there is a lot of traffic . I can't stand the noise sometimes ! Where do you live ?  
 Person1:        . I have a house in the suburbs .  
 Person2:Oh , I bet it's really quiet . But is there much to do there ?  
 Person1:        No , not much . In fact , nothing ever really happens . That's the trouble .  
 Person2:Hey . Let's trade places one weekend !  
 Person1:        OK . Great idea ! 

informal