There is no simple answer--it depends on the facts. Quotations or proposals are generally only good for a certain amount of time--generally a short period, and sometimes only while you are still on the phone. (Much depends on what, if anything, was said at the time, about how long the quote would be in effect.) If you acted on the quote right away, then even if that employee were fired, it should be valid--but if you delayed for a few days or longer, then the quote may no longer be valid. Again, it depends on what was said and how quickly your tried to accept the quote and buy the rooms.Note that to try to enforce the quote, if the hotel won't honor, you'd have to sue, which may well not be worth it.