What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Narrative: N17PK, a BE-35A was on arrival into pts, eastbound at 5,000 feet. N2617N, a CE-414G, was a departure off pts westbound direct ict at 4,000 feet. R74 issued N17PK traffic at eleven o'clock at 4,000. The ntap indicated N17PK was descending through 4,700 feet. Separation was lost at this time. R74 requested N17PK'S altitude. N17PK reported at 4,200 feet. R74 advised N17PK the assigned altitude was 5,000 feet and instructed N178PK to climb and maintain 5,000 feet. N17PK stated he thought he had been cleared to 4,000 feet and advised he was climbing to 5,000 feet.
As the FAA filed it
NARRATIVE: N17PK, A BE-35A WAS ON ARRIVAL INTO PTS, EASTBOUND AT 5,000 FEET. N2617N, A CE-414G, WAS A DEPARTURE OFF PTS WESTBOUND DIRECT ICT AT 4,000 FEET. R74 ISSUED N17PK TRAFFIC AT ELEVEN O'CLOCK AT 4,000. THE NTAP INDICATED N17PK WAS DESCENDING THROUGH 4,700 FEET. SEPARATION WAS LOST AT THIS TIME. R74 REQUESTED N17PK'S ALTITUDE. N17PK REPORTED AT 4,200 FEET. R74 ADVISED N17PK THE ASSIGNED ALTITUDE WAS 5,000 FEET AND INSTRUCTED N178PK TO CLIMB AND MAINTAIN 5,000 FEET. N17PK STATED HE THOUGHT HE HAD BEEN CLEARED TO 4,000 FEET AND ADVISED HE WAS CLIMBING TO 5,000 FEET.