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:       Write down your name here in ink .  
 Person2:But I don ’ t have a pen with me . May I use a pencil ?  
 Person1:        I ’ m afraid a pencil won ’ t do . Wait a moment , I ’ ll find you one . 

informal