She's the perfect candidate for the job, but I need to confirm her 'availability'. [=I need to make sure she is available]
The woman who answered the phone said, “I'm sorry, but Mr. Adams is not 'available' right now. May I take a message?”
He wanted to ask her on a date, but wasn't sure if she was 'available'. [='single']
(..) the Prancing Pony Excuse me. Good evening,little masters. What can I do for you? If you're seeking accommodation,we got some cozy Hobbit-sized rooms available. Always proud to cater to the Little Folk,Mister...? Underhill. My name's Underhill. -Underhill,yes. -We're friends of Gandalf the Grey. (..)2001 The Lord of the Rings: The Fellowship of the Ring