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'm going to try sky diving this weekend . 
 Person2:I wouldn't do it if I were you . 
 Person1:        It's sounds like fun . 
 Person2:It's very dangerous , you know . 
 Person1:        I want to try something exciting . 
 Person2:It's an easy way to get hurt , let me tell you . 
 Person1:        I'll tell you all about it next Monday . 
 Person2:Well , take care of yourself , and don't say I didn't warn you . 

informal