Red line

Sometimes even we are unable to give customers what we want. I'm sorry, but we can't predict everything that happens and expect to have a full stock whenever you come in. Two short stories:
First, a family calls in and I tell them that it is quite busy now but will hopefully clear up in the hour they say it will take for them to arrive. They enter the restaurant and it's much quieter. They request the private room; I seat them and get drinks: plum wine, Chardonnay, a Coke and a sweet tea. I tell them that we have run out of avocado after such a busy evening, and that we're terribly sorry but will replace anything with avocado in it with cucumber. This is a problem. The father, about to take a sip of his wine, is slapped lightly on the wrist by his wife, who tells me that "We are unable to dine with you tonight." I kind of just sit there, kneeling on the ground, as they stand and leave. I stare at the wine glasses, unsure of what to do with them. I go back to the kitchen and shrug when the chef gives me a look. I'm not sure what just happened, either.
(Hey, it's better than this other place that I heard ran out of seaweed one night. You can't make sushi at all without that!)
Second, on our sushi list, we mark through the things we do not have for the day. Usually, fatty tuna is the only thing, as it's the only item we cannot guarantee on the menu. This day, it was fatty tuna, striped bass, uni, and a specialty roll of ours that were marked out. People will sometimes ask to make sure that they're inferring correctly that we are out of those items, just to make sure. But sometimes we get that rebel who marks them anyway.
"I'm sorry, we're out of [this] roll."
The girl gives me a look.
"Well, it was marked through..."
"You can tell [him] that I drove four hours just for that roll."
I'm really not sure if she's serious. Sarcasm often falls over my head and leaves me looking silly. So I wait to see if she'll say anything else--I wait for a "JK!" or some indication.
"Well...can I get you anything else instead, perhaps?"
"I thought that if I marked it anyway that he would make it for me."
(Wait, so you knew that we didn't have it? Wait..what?)
(I really don't think you understand what it takes to make that roll. It's a special combination of fish and spices and such that has to be prepared ahead of time. If we don't have it, we don't have it because it takes time to make. That's why it's so yummy.)
She ends up just ordering what's on the sheet and rolling her eyes more and complaining to her friends about not being able to get that roll.
I drop off the check and return to the kitchen. I come out and the mints are gone from inside the check book, so I assume they've opened it, taken the mints out, and placed their credit card/money inside.
"May I take that for you? Are you finished with it?" (That's generally how I ask people for their checks if they're ready...I'm still not sure why, myself.)
"No. I am not finished with it." (How haughty.)
(Well, excuuuuuuuse me, princess.)