Formal:
* 안녕하세요. 이름이 클로이시죠? (Annyeonghaseyo. Ireumi Chloe-sijyo?) - This is the most polite and formal way to say it. It literally translates to "Hello. Your name is Chloe, right?"
* 안녕하세요. 클로이 씨, 만나서 반가워요. (Annyeonghaseyo. Chloe ssi, mannaseo bangawa-yo.) - This is a slightly more friendly version, meaning "Hello, Ms. Chloe, nice to meet you."
Informal:
* 안녕. 너 이름이 클로이지? (Annyeong. Neo ireumi Chloe-ji?) - This is a casual way to say it, meaning "Hi. Your name is Chloe, right?"
* 안녕, 클로이! (Annyeong, Chloe!) - This is a very informal greeting, simply meaning "Hi, Chloe!"
Note:
* The honorific "ssi" is used after someone's name in formal situations.
* You can use the honorific "nim" instead of "ssi" if you want to be even more respectful.
* If you are speaking to someone younger than you, you can omit the honorific.
It's important to choose the appropriate level of formality based on your relationship with the person you are speaking to.