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:       It seems to me that you fall for good-looking guys . 
 Person2:Yeah . 
 Person1:        Why don't you date up a handsome guy and spend time together ? 
 Person2:I have found myself a date mate . 
 Person1:        You must have a lot in common and a barrel of fun . 
 Person2:A barrel of fun , of course . He often says that I'm a date bait . 

informal