Once your vacation is approved, just two days before you travel, your boss said to you that you have to cancel your vacation. What do you do?

First we will ask to my boss, any urgently need to stay in the office for these days because you know as well, done our travel planed after two day & i planed your approvel, then boss says yes you need to office, and then discuss with boss ok shift my holiday for that days and cancellation charge tickets/hotels will pay from the Company if boss would be agree then ok, Because work while work and then all