Missing the point entirely

CALLER: That's N as in Nick, D as in Dick
ME: N as in Nancy, D as in David?
CALLER: No, that's V as in Vic
ME: V as in Victor?
CALLER: That's right.
ME: So that's V as in Victor, D as in David?
CALLER: No, that's N as in Nick, D as in Dick
ME: N as in Nancy, D as in David?
CALLER: No, that's V as in Vic
ME: *sighs*