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:       Bob , put on your shoes , your feet are really smelly .  
 Person2:No foot gives out scent .  
 Person1:        But don't forget you are in a cafe .  
 Person2:Never mind , the odour of my feet will quicken their eating speed .  
 Person1:        I simply can't bear your barbaric behavior .  
 Person2:Don ’ t pretend you are a good God .  
 Person1:        You should feel shameful for your behavior .  
 Person2:I've never experienced such a kind of feeling .  
 Person1:        I'm really sick of you . 

informal