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:       How can I lose weight , doctor ? I seem to get fatter even when I just look at food ?  
 Person2:Well , Jim . It is a combination of how much you eat , the type of food you eat , and when you eat your meals .  
 Person1:        I never eat breakfast though .  
 Person2:That's a big mistake , you should always have a good breakfast . You will not run your car without fuel , and yet you won't expect your body to work without food .  
 Person1:        I never thought about it that way .  
 Person2:I bet you eat a large evening meal , then sit and watch TV or read a book . Then instead of burning off your energy , your body stores it as fat .  
 Person1:        Oh doctor , I feel so foolish .  
 Person2:Well control is really using common sense when you plan your eating habits .  
 Person1:        I know doctor , thank you so much . 

informal