Hello. I need to check my balance but I forgot my acc number. Can you help please?
Could I get your full name, please?
Jane Doe
Right, and your PIN as well please.
Arghhh.. I forgot my PIN as well. 
Could you provide your date of birth, please?
04/04/1990
What was your mother's maiden name?
Sanders
And what was the name of the pet you had as a child?
Charlie
Your current balance is 660 in credit.
Great. Thank you
Is there anything else that I can do for you?
That is all for today. Thanks
Thank you and goodbye.