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 , Mary , what's up ? 
 Person2:not much . Last night I met this great guy at the bar and we had such a wonderful time that we decided to meet again tonight . 
 Person1:        oh , that's exciting . What's this guy like ? Is he hot ? 
 Person2:well , I didn't think so at first . But as we started talking , I found his extremely funny and witty . I couldn't stop laughing at his jokes ! We have so much in common . We like the same teams , music , a 
 Person1:        it seems you two are a good match . What qualities do you look for in a friend ? 
 Person2:there's nothing definite I think . I don't have a list or anything , but when I first meet somebody , I can usually tell whether or not that person is going to be a good friend . It seems I have radar h 
 Person1:        well , that's something I've never heard of . But if you as me what I value most in a friend , I would have to say honesty . 
 Person2:I agree . You can't expect a close relationship with a dishonest person . Those are the people that will turn their back on you when you are in need . 
 Person1:        yeah , I know . A friend in need is a friend indeed . I don't need fair-weather friends either . 

formal