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:       Well , I'm glad you're finally back . I was wondering what happened .  
 Person2:I feel kind of stupid .  
 Person1:        Why ?  
 Person2:We got lost coming back . I guess I don't really know this town yet .  
 Person1:        You got lost . You're kidding !  
 Person2:No . We took a wrong turn somewhere.And Joseph doesn't know the town at all . So I started giving him directions.But I didn't really know where we were . So we got seriously lost .  
 Person1:        You could have called .  
 Person2:I know I could have . But finally we asked someone where we were .  
 Person1:        You've been gone for two hours . How could you get lost for so long ?  
 Person2:Guess where we ended up .  
 Person1:        I don't know . Where ?  
 Person2:When we finally decided to ask someone , they told us we were in Grangerfield .  
 Person1:        Grangerfield ! You were in Grangerfield ? That's a completely different town ! How could you drive to a completely different town ?  
 Person2:I don't know.The person we asked had to give us directions to the highway to get back here .  
 Person1:        Grangerfield is like a dozen miles away from here .  
 Person2:I know it is . I don't know how it happened .  
 Person1:        Hmm , maybe I do .  
 Person2:What ?  
 Person1:        Maybe I have an idea how it happened .  
 Person2:How ?  
 Person1:        You were too busy looking at Joseph , and you weren't paying attention to the road .  
 Person2:Oh , that's what you think , huh ?  
 Person1:        Yes , that's what I think.Maybe the next time you go out with him to buy groceries , you'll get lost for even longer.Maybe six hours or so .  
 Person2:You know what , Trish ?  
 Person1:        What ?  
 Person2:I hope so . I really hope so .  
 Person1:        Hah , hah ! See ? I guessed right . You weren't watching the road at all .  
 Person2:No , I wasn't . It's kind of hard to watch the road when Joseph is behind the wheel . 

informal