What does 1 Kings 20:9 mean?

So Ahab told Ben-Hadad’s messengers, 'Tell my lord the king: I’ll do what you asked at first, but I can’t agree to this new demand.' The messengers took his answer back. 1 Kings 20:9 - Modern Text Bible

(Ahab draws a line, agreeing to the first demand but refusing to let Ben-Hadad’s men ransack everything.)