Walk the interviewer through your expertise that best relates to the business in which they specialize. This question is where it's important to have researched AAA before your interview! Be sure to finish by asking the interviewer the services they prefer you be versed in. This way you can overcome any potential objections later.
"After researching your website I see that you specialize in residential loans, commercial loans, specialist lending products, and personal/equipment loans. My specialty is personal debt management which would be a great asset to your lending clients. Is there a certain specialty you are looking for in your next hire?"
"I have a wide range of expertise when it comes to financial services. I see that AAA is looking for a candidate who brings experience in personal loans and mortgages. I have expert level knowledge in both of these areas."