No guarantees but I saw something very similar to this happen in my NH class & the airline was cool about it. There’s not a written policy I’m aware of so it’s more about talking to the right person & having a strong “hat in hand” game. The airline’s aware of what’s going on out there. They know people have options & occasionally have tough decisions to make. If you were dignified both in resignation & request for reconsideration, I think you’d be likely to find a sympathetic ear.