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:       Are you okay , man ? You don ’ t look very well .  
 Person2:Ugh , I feel terrible . I went out last night with Trevor , and things got a little out of hand .  
 Person1:        Nice ! So , where did you guys go ?  
 Person2:We hit a couple of local bars , and met up with some friends . Everything was cool until Mike came along , and it turned out that it was his birthday yesterday !  
 Person1:        Oh no ! Mike ’ s birthday is a drinkfest for sure !  
 Person2:Tell me about it ! We drank everything in the bar !  
 Person1:        Is that why you missed work today ?  
 Person2:Yeah . I woke up this morning feeling really nauseous . I threw up like five times .  
 Person1:        Www !  
 Person2:I was so dehydrated that I drank like a gallon of water , and my head has been pounding all day . I swear , I ’ m never gonna drink again !  
 Person1:        Too bad man , tonight is Tracy ’ s going away party and she asked if you were gonna go .  
 Person2:Oh , yeah . I ’ m there ! 

formal