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:       Hurry up ! Time is money ! 
 Person2:Don't build a fire under me . I know the importance of time . 
 Person1:        But you are too slow to follow them . 
 Person2:Don't you see I'm trying my best ? 

formal