Flights are late, meetings run over. If your timing moves, say so before she sets off: the desk can move the hour or the date once, where her diary has room, and the deposit and the terms travel with the booking. No agreed new time means the original booking stands. If we are the ones running behind, you hear it from us before the clock shows it, with a revised arrival time.
A confirmed booking is final, so a change never becomes a way out of it. Cancelling is charged from the agreed start: over 48 hours ahead on a one to three hour booking, any deposit becomes a 12-month credit; 48 to 24 hours ahead, half the fee; inside the last 24 hours, or on a no-show, the fee in full. Dinner dates, overnights, duos and trips count in days, 7 days and 72 hours. A deposit is set against the charge and never returned as money; the terms page has the tiers and a worked example, the faq page the rest.