Blind Date

Alan was twitching like a water diviner's rod above a subterranean lake.
"Alan! Relax," said John.
"I can't, I'm too nervous."
"Have another whiskey then."
"What's the girl's name again?"
"Um, I can't remember, Casey? Cassie?
"I hope she's better than Amanda, she was a non-starter."
"Yeah, I admit we messed up there."
"I'm relying on you guys to get it right for me this time."
"Pete knows somebody who's been out with this girl, apparently she's a real goer."
"I sure hope so."
"They've arrived! She's the blonde standing next to Derek."
"You bloody numpties! That's my sister!"