Last minute downtown dinner options for me and my daughter?

Don't worry, this isn't a lack of planning. My daughter (10) and I are heading into town from Ann Arbor this weekend for a sleepover at the Field Museum. We were planning on hanging with family tonight, but they came down with fevers this morning. The last thing I expected to be doing was finding a solid meal downtown on Valentine's Day.

Looking for something awesome. She loves tacos, sushi, and fancy stuff. Would prefer something that feels special since this trip is a Christmas present, but I'm guessing there isn't a reservation left in that entire zip code. We're willing to drive a bit, but we're staying at the Chicago Athletic Association. I just don't know downtown well enough to come up with a quick solution.