Your name is 서수영.
서 is your last name. And 수영 is your first name.
Note that:
ㅅ - s
ㅓ- eo (sometimes romanized as u)
ㅜ - u
ㅇ - ng (silent when in the beginning of a...
when we make transliteration one by one it's: 알레리but when someone who speaks Korean reads this it's more similar to your names reading: 엘를리 this one is better !!
I know how to write it, but I don''t know how to use the Korean characters on my computor, only by hand. Sorry______________________________________It's 에리카.