I work for a big cell phone company.
Me: Thanks for calling, this is u/Majahzi, can I have your name please?
Customer: This is Mike
Me: Thanks, Mike. Can I have your last name too?
C: You don’t need my last name.
Me: Yes, I do. How else am I supposed to know I’m taking to the right Mike?
C: No, I already put my phone number in the system. Do you have my account up or what?
Me: I have an account, but I don’t know if it’s yours because I don’t know your full name.
C: I am Micheal Lastname…
Me: Perfect! How can I help you Mr. Lastname?