Modern interviews are more conversational in approach, so always be prepared for a question like this. When the interviewer opens the discussion, this is the perfect opportunity to clarify any issue that you feel you did not answer as clearly as you could have. You should always have at least one inquiry in mind for the interviewer as well. Be prepared to talk about an accomplishment or strength you haven't already shared to prove your value.
"I would like to say that I have sincerely appreciated your interview style, and the opportunity to be here today. I would like to ask you if there is any reason why you would not hire me for this position, or any skills you feel I could strengthen?"
"I feel that this interview has gone well; however, I would like to readdress your question regarding my availability. Although I need to give my current employer two weeks' notice, I can begin on any online or manual based training immediately."
"I have enjoyed this interview, and I feel that I am leaving with an even greater desire to work here. Could you share with me your timeline for the next round of interviews?"
"Thank you for asking! I was wondering if I could ask you what your favorite part is, of working with this agency?"
"I would like to add that I am available to start immediately. I am very keen on this role and hope to hear from you very soon."
"I would like to add that I have a friend who referred me to your company. His name is John Doe, and he has seen a great amount of success as an account manager in your Denver branch. We went to University together, and he is prepared to act as a positive reference on my behalf, should you need it."
"Thank you for being so wonderful in this interview today! Interviews can be a bit nerve-wracking, but you honestly made this the most comfortable experience for me, which I greatly appreciate. I believe that I will find a fully satisfying, long-term fit with your school. Is there anything about my background that I can clarify for you today?"