Well, this is definitely not an ideal situation and probably looks a little bad from her perspective. But who hasn't missed an email before? As far as damage control goes, what did you say in your reply? Were you contrite and offer an explanation? (IE: "I am so sorry to have missed your email, and I sincerely hope we can reschedule. I was focussed on spending time with my family over the holidays and failed to see your message.")
Hope you can work it out!