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:       So Dick , how about getting some coffee for tonight ?  
 Person2:Coffee ? I don ’ t honestly like that kind of stuff .  
 Person1:        Come on , you can at least try a little , besides your cigarette .  
 Person2:What ’ s wrong with that ? Cigarette is the thing I go crazy for .  
 Person1:        Not for me , Dick . 

informal