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:       I ’ m sure that the boy will become nobody when he grows up . 
 Person2:Be careful of what you say , or you ’ ll have to eat humble pie . 
 Person1:        Eat humble pie ? Impossible , I ’ Ve never been wrong in judging boys like him . 

informal