Got this text when setting up first date. She's a tourist from another country.met her at an event. She is only in town for a few day. Her "someone" is across the ocean

"Hey! I’m so sorry but I don’t think I can make it. I’m sort of seeing someone back home, and he just rang for a catch up, and I now I feel really bad about the idea of meeting... I’m sorry for this to be so last minute as it’s not very fair on you, but the guilty conscience has come as a surprise to me too."

Best response? Shittest?