You mention Vader being prepped by an advisor before his chat with the Emperor. That was Sate Pestage and it was a deleted scene from the movie. I would really like to se that but even if they filmed it, adywan would probably not have access to it. Its sealed away at Skywalker ranch or something like that.
Anyway, this is the scene I think you're talking about:
286 INT VADER'S STAR DESTROYER - VADER'S CHAMBER 286
Darth Vader stands before a shimmering holographic
image which slowly comes into focus. The image is
that of SATE PESTAGE, Grand Vizier to His Eminence,
Emperor.
VADER
Sate Pestage, I would see the
Emperor. He commands it.
PESTAGE
I must warn you, Lord Vader,
The Emperor is in a foul mood.
He bids you wait. Have you any
progress to report?
VADER
The rebel base on Hoth has been
destroyed. I am tracking down
the survivors.
PESTAGE
The Emperor will be with you in
time.
VADER
I wait at his convenience.
I'm glad that scene never made it, it just sounds like the Emperors receptionist is screening his calls, and it really belittles Vader's importance if he's ranked lower than the grand vizier. besides in the movie it is the emperor that requests Vader to make contact.
I can just imagine Vader losing his temper whilst listening to cheesey hold music