The Waitress Droid is an NPC. A droid on roller skates, she works in a diner on the planet Coruscant that's run by Dex.
Silence of the Clones[]
When Obi-Wan sat in a booth at Dex's diner, the Waitress Droid asked for his order. He just asked to speak to the owner, Dex. She had Dex go talk to Obi-Wan. When Dex declined to go with Obi-Wan to the planet Kamino, he gave as one of his reasons that he couldn't leave his diner to be run by the Waitress Droids.