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:       We ’ re going to the Dragon Boat Festival tomorrow . Feel like coming along ? 
 Person2:Sure . I ’ Ve never seen a dragon boat race . 
 Person1:        Really ? I think you ’ ll love it . 
 Person2:As long as I don ’ t have to row . 

informal