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:       Hey , Leo . How come you look so terrible ? What ’ s going ’ on ?  
 Person2:You can say that again . Susan ’ brother dropped in from out of town , so I offered to put him up for a few days . But he ’ s driving me up a wall . This guy is bottomless pit .  
 Person1:        How gross ! I can ’ t handle people like that . Does he at least give you a hand around the house ?  
 Person2:He doesn ’ t lift a finger ! I bend over backwards cleaning up all day and he sleeps in until noon .  
 Person1:        Man , what a freeloader . You better do something quick or he ’ ll never hit the road . After all , he ’ s got it made in the shade here .  
 Person2:You think he might stay even longer ? !  
 Person1:        Now , don ’ t go losing your temper . If you tolerated all you can , just kick him out ... but do it with gloves . I know ! Tell him a white lie like you ’ re getting the house fumigated !  
 Person2:That wouldn ’ t be a lie ! 

informal