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:       Look at these newlyweds . They seem as if they are on top of the world .  
 Person2:Yes , they do . It's great for them to tie the knot and get married .  
 Person1:        People who have just got married feel that the world is right before them .  
 Person2:Nothing seems to be happier for them . 

informal