Hidden buttons Selenium Python

Question

Disclaimer: I am fairly new to python.

I have been trying to create a bot using selenium to reserve a spot at my university gym. However, the time slots only appear briefly. When someone reserves that time, the button disappears from the website. Does anyone know how I can find the xpath to the time slot even though it disappears from the website and program it into the script?

On another note, when a time slot is clicked, a continue button appears. I use two find_element_by_xpath lines after each other but it does not work when I run it.

Thanks for your help.

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