Ok, I got this one.

I work at a bank- and people don't get angrier about ANYTHING more than they do about perceived problems with their money.
Using their name is good- but don't over use it. Be natural.
Tell them that you understand their frustration.
Do what you can to help them- FOR REAL- no short cuts- not half-way attempts. If they have a real issue, fix it. Put yourself in their shoes.
Emphasize what you CAN do rather than what you can't.
Be personable, but professional.
If you have more specific questions about this, ask. Situations, whatever... I'll help if I can.