Customer: I'd like to add airtime.
Me: Ok, to what phone number?
Customer: Yes, I want to add minutes.
Me: Ok, and what phone number do you need to put them on.
Customer: You know, airtime, like when you put a prepaid card on your account.
Me: Yes, I understand, what phone number do you need to add the airtime to?
Customer: Uh... what?
Me: What's your phone number?
Customer: Why are you making this so difficult? *click*