I usually allow them a redo if it seems like a genuine mistake. If she didn't seem apologetic and eager to make it up to you then I'd not bother trying again.
I'm so frustrated with this one girl, had a great first date, made out, she seemed excited when I wanted to see her again, etc. Now she's saying she's still interested but is not always replying to texts, or sometimes sitting on them for ages....asked her on Thursday if we were still on for Friday, she said yes and even invited me to do something with her friends afterward, then when I asked if she wanted to do something other than what our tentative plans were (shes been working really long hours and I thought getting a drink and watching jazz might be make her tired), she didn't reply. Sent a follow up message after work and she still seemed down to hang out but I made other plans with a friend instead since I thought she was blowing me off.
I just want certainty! I don't want to give up too easily because we have a lot in common and unlike most people I meet I could actually see us dating, but this is driving me nuts. Before the date she was communicating much better.