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:       How was school today ?  
 Person2:It was great . I made some friends .  
 Person1:        Really , that's good .  
 Person2:But the lessons this semester are a little bit hard .  
 Person1:        They aren't hard . I am sure you can do it . 

informal