response: Do you have a high school diploma?  Most banks require that of their tellers.  Experience handling cash is an asset as well.
history: I'm currently working as a bank teller, it's ok. Ah, I see. Bank tellers deal directly with customers. Do you like that part of the job? Sometimes it can be fun and sometimes a headache I see, and sometimes they call you a cashier. Do you like the job overall? Yes, it's not bad most of the time. Are you full time or part time?  Interestingly, 1 out of 4 are part-time tellers. I'm full time, but there are a lot of part-time tellers
knowledge: Most teller jobs require experience with handling cash and a high school diploma.