Different Colours/Text for 'Booked' and 'Unavailable' slots?

My days go from 12pm through to 9pm.
Im available to be booked on Monday…

Every hour shows crossed out other than these two slots… Which is great.
However, what I want is… When I get a booking in one of these two slots, for the slot to show ‘Booked’ or maybe be a different colour, to the other hours of the day where I’m just generally not available to be booked?

Thank you!

Someone might correct me if I am wrong, but I do not think this is possible. While you can change the color of all of your busy and free times, I do not think there is a way to select which time is which color.