Advise Code(or 좌석 상태 코드)

Advice code:	Definition:	Change to status code:
HX	Have cancelled (by airline) Note: Refer to What do I do if a flight been cancelled by an airline using HX status?	XK
KK	Confirmed from request	HK
KL	Confirmed from waitlist	HK
NO	No action taken	XK
TK	Schedule change on a confirmed flight	HK
TL	Schedule change on a waitlisted flight	HL
TN	Schedule change on a requested flight	HN
UC	Unable to confirm	XK
UN	Unable to confirm, flight not operating	XK
US	Unable to accept sale, have waitlisted	HL
UU	Unable to confirm, have waitlisted	HL