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:       Hi , Michael , how's it going ?  
 Person2:Well , things are all right .  
 Person1:        I heard you got a new roommate . What's he like ?  
 Person2:Yeah , Bob moved in last week . He is a nice guy and so far everything is cool except this girlfriend .  
 Person1:        Oh ? What's wrong with his girlfriend ?  
 Person2:She came over last weekend . She is a nice girl but there's something about her voice that really creeps me out . I tried to smile and be polite , but the whole time all I could think was " what's wrong with your voice ? "  
 Person1:        Well , I guess it might take some time to get used to .  
 Person2:I doubt it . Last time was an oral train wreck . Listening to her talk is like chewing tin foil .  
 Person1:        Oh come on , it's not that bad .  
 Person2:No , it's so much worse . And tonight they invited me out to dinner . I really have no idea how I'm going to pull it off .  
 Person1:        Rough . Maybe you can do the most of the talking .  
 Person2:That's the plan .  
 Person1:        Good luck . 

informal