We have a limited menu . . . .

[wolfie]

One day a lady comes in and wants Butter Pecan. I politely explain to her that we don't have that one and point out we have chocolate, vanilla and flavor of the day (which was Rocky Road that day).

Sounds like time for the old joke:

Server: How do you spell the "choc" in "chocolate"?
Customer: C-H-O-C
S: How do you spell the "van" in "vanilla"?
C: V-A-N
S: How do you spell the "fuck" in "Butter Pecan"?
C: There's no "fuck" in "butter pecan"
S: That's what I've been trying to tell you.

If you don't get it, try saying the customer's last line out loud.