Booked two separate tickets both CX. First leg from HKT to HKG in Y and the next leg HKG to JFK in J. I called in and had the agent link the PNRs so the baggage could be through checked, since I am only transiting in HKG. But for checkin at HKT can I use the Biz Class check in so the bags are appropriately tagged as priority for pick up in JFK?