Citizenship

Hello everyone,
I passed my interview which was done last Monday. The officer asked if I want to take the oath the following day, but due to an international trip already booked, I asked if I can get in line with the resgular queue. The officer said it will take a few weeks to get a schedule which I am fine with. What I did not expect is that they will schedule me next week. Someone called me today to let me know that. So I asked if I can reschedule. She said I should call the 1-800 number. It was close to closing time so I did not get a chance to talk to someone. I have already paid for the trip and can’t cancel. If I don’t go I’m losing a lot of money that I have saved for.. at least it’s a lot for me.. I’ve also been looking forward to this since I have not seen friends/family for a long time being that I live by myself. I have checked the passport agency if I can get an appointment, but there is none available 3 days before my flight. The passport processing time will take at least 4 weeks and that is expedited. If I take my oath, then I will for sure not be able to get a passport in time for my flight. Do you think they will be considerate if I cancel? My worry is that they cancel and they put me back in the queue onty to get another schedule right away.. I am not sure if they will consider the timeframe I will be out of the country or if they care.. Thanks in advance..