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 have a bone to pick with you .  
 Person2:Okay . Let ’ s clear the air . What are you getting at ?  
 Person1:        You always have a chip on your shoulder .  
 Person2:I ’ m sorry . But I don ’ t meant to get your goat . 

informal