So far as I'm concerned, ladyc, you've done an excellent job on improving this. All except the beginning, I'm afraid. But I still think you can improve it. Here's how I'd do it: feel free to borrow all or any of this, and don’t be shy to - this is your story, and it hangs together the way you want it to. My suggestions are insignificant.
There was a knock on my door. It was open and the new candidate stood outside.
“Come in,” I told her. She entered. I gestured towards the chair across the desk from me, “Sit down and we will begin. My name is Adept Jason Smythe. You may address me as Master, Adept or simply Sir.”
She sat on the chair I had indicated and looked straight at me. I could see she was a little apprehensive but she had poise and confidence, and she returned my gaze with a steady look.
“And your name is,” I glanced briefly down at the file before me,
“Catherine Grahm.”
I shuffled through the file on my desk; “I understand from your application here that you ultimately wish to be a Submissive Adept”
Catherine looked nervous. “Yes, Sir” she nodded as she replied.
“Ms. Grahm, Are you prepared to be secluded from the world for a period of six months to a year that is necessary for first year trainees?”
She nodded.
“Now you understand that we instruct women and men in the art of being good ‘sexual servants’. Slave conjures too many images of ownership. This is not about ownership.” I said sternly. “For the servants we place it is a two-way street; the master/mistress is as much ‘owned’ as the slave. Each needs the other in order to achieve sexual fulfillment. We train individuals to take either the dominant role, the submissive role or to take and give pleasure in switching between the two.”
“Yes, Sir. All I desire is to be fulfilled and give fulfilment in return.” She looked at me with growing confidence shining from her eyes.
“You will begin as an Admitted ...
Over to you now 
TYWD