[Ah, she had a feeling this might be the response she got.]

Just the truth: that you've been working very hard the past few weeks and had forgotten to give yourself time to recover from the Valentine's Day rush. [And other things, but Allura thought it would've been a bit much to bring personal matters into Usagi's work and embarrass her.] They all agreed that the 16th and 17th would work just as well for their plans, and that such a helpful and reliable consultant deserves a break too. And good evening to you too.