Taxis and booster seats

We need to take a taxi one morning for a pre- opening ADR. We will need 1 booster seat for a 5yo. Will the cabs have this, or do I need to make a special request? Do they charge for this? Should I call to arrange the night before? Will a Disney hotel front desk do this for me? Thanks in advance to anyone who has done this and can share your experience!

I don’t know if you know this, but you do not need a car seat or a booster seat in taxis. We traveled with DD when she was 2 1/2. I wasn’t sure what was safest in the taxi. She was too small for the seat belt. I had her on my lap. She uses a booster now, probably can get away with just the buckle (she’s 4). I’ve never requested a booster or a car seat, so I can’t help with that. Its safer, for sure, but not required.