Inform the barista that your food order is missing from your tray and confirm your order details.
Excuse me, I think there is something missing from my order.
Oh, I'm sorry about that. What are you missing?
I ordered a blueberry muffin with my espresso, but I only received the coffee.
Let me check your receipt. Ah, I see it here. I must have forgotten to grab it from the display case.
No problem. Could you please get that for me now?
Of course. Would you like me to warm that muffin up for you, or is it fine as it is?
Warming it up would be great, thank you.
Sure thing. It'll just take a few seconds. Here you go, enjoy your breakfast!
Thank you very much for your help.