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:       Can I get you something to drink ? 
 Person2:No , that's okay , I already have a coke.Why don't you have a seat , you look like you've been on your feet all day . 
 Person1:        I guess I could take a break.So , how do you like Denver ? 
 Person2:It's great ! The mountains here are beautiful and the skiing is spectacular.Have you been here for a long time ? 
 Person1:        About six years ... 
 Person2:What do you do for a living ? 
 Person1:        I manage one of the ski lodges.It ' s a great job , I can spend a lot of my time outdoors , and I also get to ski for free all season . 
 Person2:Wow , talk about job perks ! That's great . I would like to do something exciting like that.But I am only an accountant.Not too much excitement there.huh ? 
 Person1:        That's okay.If it weren't for you accountants , nobody would have the money to go skiing ! 

informal