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's a lot of work running a campaign , isn't it !  
 Person2:I had no idea when I volunteered to assist governor Brown with this campaign what I was getting myself into .  
 Person1:        Hang in there . The hardest part is just about over .  
 Person2:How Ay years have you been working with him ?  
 Person1:        About 15 . I've seen him work hard for a lot of good changes .  
 Person2:It's easier doing this kind hard work when I know that I trust the man behind the posters .  
 Person1:        Did you know we're trying to talk him into considering a presidential campaign ?  
 Person2:He would be good . 

formal