Hi, someone transferred $500 out of my account. Can you help me?
Could I get your full name, please?
Katarina Miller
Can you tell me your account number, please?
I can't remember it but my PIN is 5380
Could you provide your date of birth, please?
I'm sorry, I know I've been lonely lately but I'm pretty sure that's not what I contacted you for. Sorry, I just forget things sometimes.
If you know your account number, I can process your fraud report.  Otherwise I will need your date of birth and for you to answer your two security questions.
Account number? I guess I didn't contact you just to talk then. Hold on, let me get my bearings here. 
Sure, take your time.  Just let me know whether you can remember your account number or whether you'd like to provide your date of birth and answer your security questions.
I can't remember the year I was born, I'm so old now. I do remember my childhood dog, Buddy. He was such a good doggie.
What was your mother's maiden name?
I don't know, I don't even remember if I ever knew her first name. It wasn't polite to refer to her as anything but "mother".
I am sorry, but I cannot authenticate you with the information you have provided.
Okay, I guess I'll just have to try again later. Thanks for talking to me.
Is there anything else that I can do for you?
That was it. You have a good day now.
Thank you and goodbye.