Maybe It Involves a Primitive Form of Teleportation

When I left for my most recent trip, I had to drive myself to the airport. I parked the car out in the long term parking lot, scoring a super sweet parking spot just a few yards from one of the shuttle stops. While waiting for the shuttle to pick me up, I noticed a poster inside the shelter, right next to the map of the parking areas.

"Overloaded with baggage? Next time, use Curbside Check-in instead!"

So, wait. Let me get this straight. Instead of hauling my luggage through the parking lot, onto the shuttle, back out of the shuttle, and up to the curbside check-in, I have the option of using a magic curbside check-in that appears right next to my car upon parking? Where do I sign up for that service? And will it also deliver the bags back to my car at the end of my trip so that I don't have to be overloaded with baggage between the baggage claim and the extended parking lot? Or am I on my own for that bit? Oh, wait! I know! It's actually a riddle. I handle your bags before they arrive in my hands. Who am I?