Rescheduling interview for naturalization

[zephyr7]

Hello all. I've received an invitation for my N400 naturalization interview, but I may not be able to make it that day.
- If I request a reschedule, how long would it take for the next opportunity (on average)?
- Is it possible to request an earlier opportunity?
- Is travel abroad to visit family for the holidays an acceptable reason for rescheduling?
Thanks in advance!