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 , dear . My weight has gone up again . 
 Person2:I'm not surprised . You eat too much . 
 Person1:        And I suppose sitting at a desk all day at the office doesn't help . 
 Person2:Yes , I think so . 
 Person1:        I do wish I could lose weight 
 Person2:Well , why don't you go on a diet ? 
 Person1:        I've tried diets before but they've never worked . 
 Person2:Perhaps you should exercise more . Why don't you go to an exercise class ? 
 Person1:        Yes , maybe I should . 

informal