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:       If he promised to help you , I'm sure he will help . He's a man of his word .  
 Person2:You said it . I always count on him when I need his help .  
 Person1:        Last year he helped me out of trouble , too . 

informal