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 don't know what I can do now . I'm down and out .  
 Person2:You are not the gray train , I guess . But bite the bullet and you'll soon be in the chips again .  
 Person1:        I hope so . But I'm always caught short .  
 Person2:But the darkest hour is the nearest dawn . I bet you'll soon turn the table . 

informal