In airplanes, the words air hostess and cabin crew generally mean the same job.
They make sure passengers are safe and comfy during the entire flight.
They give food and drinks, help people if they need anything, check safety before the plane flies, and show everyone the safety rules.
Earlier, people mostly said air hostess, but now the word cabin crew is used because nowadays both men and women are doing this job.
The work is the same no matter what you call it!