Rule reminder
Standard responses: 'Bene, grazie!' (Fine, thank you!), 'Molto bene!' (Very well!), 'Così così.' (So-so.), 'Non c'è male.' (Not bad.), 'Male.' (Bad.) Always add 'E tu?' (informal) or 'E Lei?' (formal) to ask back.
Someone asks 'Come stai?' and you are doing great. What do you say?