When you ask for referrals don't think of yourself - think of others. Ask yourself - have you added value to your clients' lives? If the answer is yes, ask your current clients if they're happy they found you and started their investment journey with you.
Re-visit their reasons for investing. Then ask your clients whether they know people who should be doing what they are doing. Do they have friends or family who may be jeopardizing their financial future by not planning for retirement?
If so, they need to get them on the phone and get them to make an appointment with you, and soon!
Thanks for your confidence in allowing me to play an important role in your success. As always, good luck and good presenting.