With Motion, you can easily grab your availabilities and copy them in a message like this:
Manually choose times to share:
Open Booking → option + A on Mac (or alt + A on Windows)
Click "Drag time slots"
Click & drag your available times on the calendar.
Edit your details on the left. You can invite teammates to the meeting, customize the event details and one-time booking link that will be sent with your message.
Review your message, then use cmd/ctrl + c to copy your message.