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:       What's all this noise about ? 
 Person2:They're discussing whether they should replace Miss Smith , the Music teacher . 
 Person1:        Why ? 
 Person2:Because she's not responsible enough . 

formal