Originally Posted by Unionruler

This is called churning and is specifically prohibited by the ADM Memorandum/ Policy of most airlines. If your TA does it very infrequently it won't get picked up by data analytics, but anything more than that and the ratio of tickets issued to inventory put on hold will stand out. AA might investigate, and thereafter debit memo the TA up to the full fare for each instance where inventory was held to "save a fare" for a customer with scarce intention of ticketing.