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:       Hi , John , how was your vacation ?  
 Person2:Awesome , we went to Australia and New Zealand .  
 Person1:        That must have been wonderful . Do anything interesting ?  
 Person2:Well , we went bungee jumping when we were in Australia .  
 Person1:        Wow ! Isn ’ t that dangerous ?  
 Person2:A little , but the rush was worth it .  
 Person1:        Tell me about it .  
 Person2:We jumped off a bridge and fell 500 feet before the bungee cord caught us .  
 Person1:        500 feet ! I would never be able to do that .  
 Person2:Yeah , It was scary , but exhilarating . 

informal