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:       Has the game started yet ?  
 Person2:Yeah , about 5 minutes ago .  
 Person1:        Who's winning ?  
 Person2:The Bulls , of course !  
 Person1:        What ! That wasn't a foul ! C ’ mon , ref !  
 Person2:Don ’ t worry , Shan always screws up free throws .  
 Person1:        You were right ! He didn ’ t make the shot !  
 Person2:That was a great shot ! A three pointer , yeah !  
 Person1:        Did you see that ? He traveled and the ref didn ’ t call it !  
 Person2:This ref needs glasses . Hey ref , open your eyes ! I can ’ t believe he didn ’ t see that !  
 Person1:        Okay ... end of the first quarter ... Alright , I ’ m gonna make a beer run . 

informal