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:       Mary has really gotten under my skin .  
 Person2:I know what love it . When I was young , I felt the same way .  
 Person1:        I think I ’ m crazy about her .  
 Person2:You are , why not ask for a date ? 

informal