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 am not surprised , you eat too much .  
 Person1:        And I suppose sitting at the desk all day in the office doesn't help .  
 Person2:No , I wouldn't think so .  
 Person1:        I do wish I could lose weight .  
 Person2:Well , why don't you go on the diet ?  
 Person1:        I've tried diets before but they've never worked .  
 Person2:Perhaps you should excercise more . Why don't you go to an exercise class .  
 Person1:        Yes , maybe I should . 

informal