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:       why are you in such a good mood today ?  
 Person2:well , yesterday , I decided to face my fear of heights .  
 Person1:        I didn't know you were scared of heights ! Was it really bad ?  
 Person2:let me put it this way . I've never seen a professional sorts game in a stadium because I could never get myself to walk to the top of the stairs to sit down .  
 Person1:        so what did you do about it yesterday ?  
 Person2:I went sky-diving !  
 Person1:        you're kidding me ! that sounds really scary !  
 Person2:It was scary , but it felt great , too .  
 Person1:        weren't you scared ?  
 Person2:of course I was scared . But I had an instructor that went with me and that helped .  
 Person1:        so have you cured your fear of heights ?  
 Person2:I think so . After I jumped out of the plane , I realized that I should just enjoy life . Worrying about it or not doing things out of fear is just plain silly .  
 Person1:        I'm impressed .  
 Person2:are you scared of anything ?  
 Person1:        well , sometimes I get scared when I'm in my apartment all by myself .  
 Person2:what do you think is going to happen ?  
 Person1:        I always worry that the door is unlocked or that a window is open and that a stranger will come in and steal my things .  
 Person2:it sounds like you just need to be more careful . 

informal