Inserting boolean types as an alias?

Hello I am new to this site and also a student. I am working on an assignment
and was wondering if there is a way to make an alias for a boolean? For
example when I am making a table called club_games and it must contain the
memberID, gameID, count, and status as column fields. When I enter the data
for status I want it to say either "unavailable" for false and "available"
for true. but I don't know how to do that.
This is what I have currently for the line that I am specifically talking
about:

INSERT INTO club_Games(memberID, gameID, hardwareID, count, status)
VALUES ((SELECT memberID FROM members WHERE name = 'Fred Flinstone'),
(SELECT gameID FROM games WHERE name = 'Jurrasic Park'), NULL, 1, 'true');

when I do the SELECT * FROM club_Games this is my output:

id gameid memberid hardwareid count
status
1 12345zzzzz A12345 <null> 1
t

Where it says t for status I wanted it to say available but mean true for
boolean, but I don't know how to do that. Thanks to all for help.

My file is attached if you would like to view my assignment. task5.txt
<http://postgresql.1045698.n5.nabble.com/file/n5781328/task5.txt>

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