Are They Chasing Down a Lead?

It's not super clear why they're back at the lake. They're there because anastasia says, hey, you got to go. It's its opening night. We got to go to see don giovanni. But did they know that that message would eventually go to mave? I'm confused. Is like, even if they programmed him to say that or her to say that, like, how did they known that she would go at the right time? Because it feels like these reservations or specific date are for a specific day and time. So whatever. The show hasn't put too much work in explaining it.