"Sorry?" Her nose wrinkles up at his question, as she's a mix of confused and offended by the way he's speaking to her. Like she's familiar to him, like he's got the right to be condescending in her direction.

"I've never been a waitress. Never been involved in collecting badges, either."

She takes a step back, almost as if she's considering turning and leaving. There's something about him that puts her on edge, and not knowing what it is scares her. So she glances over her shoulder, looking at some of the others who are here, before looking back to him.

"You have me confused with someone else. My name's Clara Oswald. Think I'd remember if we had met before." He's certainly sarcastic enough for her to remember.