(USA) Favorite Customer Interaction

Customer: Can I get a Sundae in a cone?

Me: Do you mean an ice cream cone?

Customer: No I want a Sundae in a cone!

Me: Oh do you want an ice cream cone in a cup?

Customer: No I just want to get a Sundae in a cone.

Me: Ohh do you want an ice cream cone with a topping on top?

Customer: Yeah

Me: Okay which one would you like Fudge or Caramel?

Customer I want plain.

Me: Sir that is just an ice cream cone…

Customer: Okay…

Was this on me? Is this something I should have known? So confused