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 ’ re you doing now ? 
 Person2:I ’ m watching TV . 
 Person1:        You ’ re supposed to clean your teeth before you go to bed . 
 Person2:I will . 
 Person1:        And don ’ t ever forget it . 

formal