Quick Tip:
The suffix '-ssi' (씨) or '-nim' (님) is usually added to show respect to the person you are calling. Try not to call someone directly by their name without this.
Basic greeting:
잘 주무셨어요(jal jumusyeosseoyo) 용골씨 - Good morning, Mr./Ms. Keel
안녕하세요 (annyeonghaseyo) 용골님 - Hello/Good morning/afternoon/evening, Mr./Ms. Keel