Yes
expression
Want me to write a haiku (はい)? Yes, of course! はい is a formal word for "yes". You can use it to let someone know they’re right, or simply that you’re listening, as well as to respond if someone says your name.
「チャンドラーさん」「はい！」
"Mr. Chandler." "Yes!"
はい、ありがとうございます。
Yes, thank you very much.
はい、分かりました。
Yes, understood.