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:       Lots of elderly people want peace and quiet in their old age , but young people want an unconstrained life .  
 Person2:It would be good for both if they lived separately . My parents want to live apart from us .  
 Person1:        What if old people are in poor health and need to be looked after ?  
 Person2:Young people ought to carry out their responsibilities . If it's needed , they would live with their parents .  
 Person1:        When I ’ m old , I ’ ll also be like that .  
 Person2:You need a child first , and that's your duty , too .  
 Person1:        I know that's what I must do . 

formal