The school has recruited people to work in duty-free shops in dubai international airport, UAE. I wonder if it is reliable?

Recruitment from schools is generally verified, and the credibility should still be there.

However, Dubai is not a paradise on earth as people think. It is a paradise for the rich, not for us ordinary people.

It depends on the treatment given by the company and whether it includes room and board, etc. before the final decision can be made.

Good luck.