This is interesting, sorry for late reply but what happened to me was...I sent email that we are out of country until certain date, few days later reply came saying thank for letting us know and we'll contact you for new date.thanks for sharing this.
Unfortunately my case was different. I did email them to advise on what to do prior to my ceremony.
Have also attended the ceremony and was told to make a decision and if not willing to do it will be sent another date.
6 weeks later I received this
“You were scheduled to take the Oath of Citizenship on April 13, 2022. We received the explanation you provided for being unable to attend this event. We reviewed your explanation and regret to inform you that it was deemed unreasonable because travel for personal reasons does not warrant postponement of the Oath of Citizenship.
Please note that a Final Notice to Appear will follow in due course.”
still didn’t hear back yet
Same week after we got back email came with new date and we did ceremony this week..all went smooth