Hunt for a dress

I really have been dragging out on finding a dress to wear for the wedding I'm attending in Austin in a couple of days. Typically, and now I'm starting to panic a bit haha. It's going to be warm in Texas at the time, so need to find a dress that goes down to the knees that looks summerish. Thinking flower pattern or dusty pastels. A little purple or blue, is what I have in mind. Need to go shopping!