Girls, I know this is kinda evil, but what do you think of this plan of mine?

Go With it, if she seems to really be nice throughout the date. ask her why she lied about you to the manager. and if things go well, ask her to tell the manager she was lying(she mite get in trouble). if she says no, continue to be nice to her throughout the date and when ur done eating(order a HUGE Meal), say u really have to go to the bathroom and vomit. thats when you ditch her and leave her with a Fat Bill.