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:       This is a nice set of wheels . How much did the dealer charge you for this ?  
 Person2:A lot . I probably got to moonlight for the rest of my life , but so what , it ’ s worth it . Come on , get in . Let ’ s take a drive .  
 Person1:        Okay then , let ’ s go fast ! Whoa ! This thing can really accelerate fast .  
 Person2:Check out what happens when I put on the brakes suddenly . It can stop quickly .  
 Person1:        Hey , just watch out for cops or you ’ re gonna end up in the slammer . You know you tend to go fast ?  
 Person2:Yes , I know it . I went through my last set of tires fast . I even had three flat tires in two weeks .  
 Person1:        Now watch ... some guys probably run a light and hit your car .  
 Person2:Cut out , would you ? 

informal