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 went bungee jumping yesterday . It was so exciting .  
 Person2:Do you really enjoy such dangerous sports ?  
 Person1:        Yes , They are great fun and very challenging , too . Some day I'll want to try deep-sea diving and rock-climbing , too .  
 Person2:You are a real fan of extreme sports .  
 Person1:        Yes . I love facing danger and overcoming it . It has become part of my life . 

informal