Dear Ms. Green,
Thank you for posting your request on History Hub!
We suggest that you search the city directories available at the New Orleans Public Library or online from Ancestry or Fold3 for the name of the cosmetology school during the dates you seek. There may be a fee for using these online services. Instead, please check for access at your local library as many library systems subscribe to these sites, making them free for their patrons.
We hope this is helpful. Best of luck with your research!