Replying to a solicitation for a job interview should be done in the context of making such an interview convenient for the prospective employer, not the employee. Further, any reply that narrowed opportunities to only a handful of dates can create the notion that interviewing for this prospective job is something you'll do if nothing better or more important appears on your schedule. On that basis, I would respectfully disagree with the selected answer and submit the following:
"I will make every effort to accommodate your earliest convenience for
an interview. My schedule shows that I have no conflicts on August
16th, 18th, and 19th."
The objective is two-fold: Be gracious and deferential to the prospective employer, and provide specific dates for which scheduling would be simplest.