여보세요

hello; hi; hey there

Explanation

1. hello; hi; hey there
An exclamation used to call another person who is nearby.

2. hello
An exclamation used to call the other person on the phone.

Examples
여보세요, 아무도 안 계세요?
여보세요, 뭐 좀 여쭤 볼게요
여보세요, 여기 물 한 잔만 주세요

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