Automation - Fluentbooking

I want to create an automation with the following flow:

1. Trigger - A booking confirmed.
2. Wait till 9pm the day before the meeting.
3. Send an email asking the invited party to RSVP his attendance. The will be done by clicking on a link (A SmartLink so a tag will be attached, so I know he confirmed).

My question - is there an option to create the #2 part? I know I have the option to wait until a custom field, and I could save the booking date to the custom field, but that still won't give me the option of sending the email a day before.

And regarding the email reminder option in fluentbooking that you might suggest - there is no option to customize the different email reminders sent. I schedule one the day before and 2 hours before the event. And I don't want to send a request for RSVP 2 hours before, if one was already sent.