I like it when real life presents you with dialogue (or rather 'dramatic beats' I suppose) no script editor would ever let you get away with in real life.
ON THE PHONE
ME: Hello, I was coming up to London for a meeting, but that's just been cancelled, so I'd like to cancel my hotel reservation please. Just one night, for, erm, sixty quid,
LASTMINUTE PERSON: Okay, let me just check. (she wanders off for a bit) Right, the hotel has a 'within twenty four hours' cancellation policy, so there'll be no charge there.
LASTMINUTE PERSON: ... however, lastiminute.com do charge twenty pounds admin fee for cancellation.
ME: (mildly) Tch, that seems a bit excessive.
LASTMINUTE PERSON: (immediately) Okay, we'll revoke that.
LASTMINUTE PERSON: Yup, we'll refund the full amount.
ME: Er, right, great, brilliant.
LASTMINUTE PERSON: Anything else?
Me: No thank you.