To convey a similar meaning in a more respectful way, you could consider:
* "Parking attendant": This is a neutral and professional term.
* "Valet": This is a more formal term for a parking attendant.
* "Parking lot worker": This is a straightforward and neutral description.
It's important to remember that using respectful language is crucial, and using terms like "lot boy" can be hurtful and disrespectful.