Macam mana nak cakap 'NO' kalau orang minta tolong

Macam mana nak cakap 'NO' politely bila orang mintak tolong time kita busy? Boleh try ayat ni.I’m honoured but I can’t Sorry, I'm booked into something else right now Sadly I have something else I’m sorry but I'm not taking anything else right nowKita kena belajar juga untuk saying NO...