'Sir' in the Bible

Then I asked one nearby, "What are these, sir?" The angelic messenger who replied to me said, "I will show you what these are."

Then I asked the messenger who spoke with me, "What are these, sir?"

He replied, "Don't you know what these are?" So I responded, "No, sir."

He replied, "Don't you know what these are?" And I said, "No, sir."

Then I asked the angelic messenger who was speaking with me, "What are these, sir?"