(a) As used in this section: (1) "Complaint" includes a cross-complaint. (2) "Plaintiff" includes a cross-complainant. (3) "Defendant" includes a cross-defendant. (b) When a complaint is filed in an action to recover damages for personal injury or wrongful death, the defendant may at any time request a statement setting forth the nature and amount of damages being sought. The request shall be served upon the plaintiff, who shall serve a responsive statement as to the damages within 15 days. In the