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 wish I knew who had moved our flower pots .  
 Person2:It was me . I am so sorry .  
 Person1:        What did you think you were doing ?  
 Person2:I had to move it , so that I can get my bike through .  
 Person1:        How dare you be so inconsiderate ? That's wrong .  
 Person2:I am awfully sorry . I didn't think you would mind so much .  
 Person1:        Never do that again .  
 Person2:I promise . 

informal