Task start date & time finder (or autopicker)

In my world Amplenote knows:
My working day
My calendar (when I'm free/busy)
The duration of the task I'm currently looking at

Seems like a really useful thing to have it troll my availability and find me the next time I'm free for the task's duration and maybe even auto-set that as the start date/time with a single magical click? Saves me searching through my calendar.