'Thank you for choosing [company], Technical Support, can I get your phone number please?'
Stupid Customer reads out their phone number
'OK.. here's your account. I'm going to need your date of birth and postal code to authorize you.'
'*SIGH* I told them this already, but I'm not going to give my date of birth... that's private information.'
'umm.. Alright sir, but from my standpoint that's the only way I can grant access to your account. If you want, I can get you to [department] to authorize you with other info.'
The Stupid Customer hangs up.