How do I see booked session for controlles on VAT-Spy?

Every time I plan a flight in vatsim I look in VAT-Spy to see what controllers are online and based on that I know where is my departure and my arrivel. Sometimes When I get to my destination no controllers are online. What im asking here is: can I see anywhere when will controllers be online in the future?
for example: the time is 19:00 and I want to see which airport will have online controllers at 20:30.

is there anything to do to solve it?

Not in Vatspy. You can have a look at ATC bookings | StatSim .

thanks for the help both of you