"How about next weekend?"

How do you respond to that? Met a girl online, got the # ASAP. Called to setup a date, proposed Saturday or Sunday night. "I'm actually really busy this weekend, how about next weekend?" Proposes a reschedule, could be worse. I responded, maintaining a playful tone, "too bad, I may forget about you before then, you can contact me when you figure it out." She said sure, then I ended the call. Now she's blowing me up with random texts.