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:       I understand your feeling . When someone is feeling at loose ends , we may show mercy on him . This is what we call the " milk of human kindness " .  
 Person2:That's right . But feeling sorry for someone is one thing , and sticking to our principles is another . We must make a clear cut between them .  
 Person1:        You've take the words out of my mouth . 

informal