Well he hadn't been thrown out of the office, that was a good sign. Cyrus briefly pondered how best to answer the question, wondering if it would be a good idea to mention he was from Ravok. It could go either way there, he knew how the city worked which would probably be an asset but that would also raise suspicions. Deciding that it would be worth the risk he opted to tell the knight, they probably had ways of finding out where he was from any way, best to be up front about it.
"I am Cyrus Blackfire of Ravok. I grew up under the shadow of the Black Sun and Rhysol, their chaotic goals disgusted me so I left. I want to join the Knights to improve my skills and because I have great respect for the order you promote here. I am good with a blade and have led men against the odd bandit raid, I would place those skills at your disposal Ser." The man said, matching the knight's gaze.
Hopefully he would see the use of having Cyrus in the Knights, a man who knew the ways of Ravok would be very useful. Especially considering his deep seated loathing of the God of Evil and his servants.