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:       Maybe we all will be all things to all men .  
 Person2:How terrible !  
 Person1:        But for the life , we'll be changed by this society .  
 Person2:I really don't want to go into the world , I feel afraid of it .  
 Person1:        Don't be silly . We have reached the age to take the responsibility by ourselves .  
 Person2:I know . 

informal