"Gourmet food. Harry was walking down Regen..." joke

Gourmet food.
Harry was walking down Regent Street and stepped into a posh gourmet food shop.
An impressive salesperson in a smart morning coat with tails approached him and politely asked, "Can I help you, Sir?"
"Yes," replied Harry, "I would like to buy a pound of lox."
"No. No," responded the dignified salesperson, "You mean smoked salmon."
"OK, a pound of smoked salmon, then."
"Anything else?"
"Yes, a dozen blintzes."
"No. No. You mean crepes."
"Okay, a dozen crepes."
"Anything else?"
"Yes. A pound of chopped liver."
"No. No. You mean pate."
"Okay," said Harry, "A pound of pate then and I`d like you to deliver all of this to my house on Saturday."
"Look," retorted the indignant salesperson, "we don`t schlep on Shabbos!"