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:       Do you know anyone who ’ s had plastic surgery ?  
 Person2:You mean like a breast enlargement ? I don't think that's really necessary . That's not the way a woman should stay attractive .  
 Person1:        Why not ? Why can't we go back to the way things were ?  
 Person2:Because ... I don't know . But , Connie , you wouldn't do that , would you ?  
 Person1:        Darned right I would !  
 Person2:Maybe make-up would be enough ?  
 Person1:        Come on , Liz . Be open-minded ! Look at my eyes , they are puffy . And my eye bags , they are dark and loose and full of lines and circles . I really hope surgery can wipe out the tired feelings .  
 Person2:But what would other people think ?  
 Person1:        I don't care what other people think . I am ready for a lift . 

informal