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:       Oh , my god !  
 Person2:What !  
 Person1:        That's the cutest little doll I've ever seen in my life !  
 Person2:Chill out . It's just Kenny from South Park .  
 Person1:        What park ? You found a doll in a park ? Gross !  
 Person2:South Park is a popular cartoon . You're so out of it , Jen  
 Person1:        Well , don't blame me ! I never get a chance to watch TV . 

informal