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:       Mike ! What's going on , man ! Long time no see !  
 Person2:Hey , Pat ! Yeah , I haven ’ t seen you in ages ! How is going ?  
 Person1:        Things doing great ! It ’ s funny running into you like this . Smell well , just last week I ran into Matt as well .  
 Person2:Yeah ? How ’ s he doing ?  
 Person1:        He ’ s doing well . We went out for a couple of beers and the funniest thing happened .  
 Person2:Oh yeah ?  
 Person1:        Well , we were talking and catching up on what we ’ Ve been doing , talking about work and family , when all of a sudden , Matt saw a mouse run under his chair and he completely lost it ! He started freaking out , and screaming ...  
 Person2:Ha ha , really ?  
 Person1:        Yeah , and the funniest thing was , that he jumped on to his chair and started shrieking like a girl . You had to be there ! Everyone was staring and laughing ... it was hilarious ! 

informal