Today’s (second) glitch:
This sentence has two problems.
First, my should not be capitalized.
Second, a dash used like the one in this example indicates an abrupt change in direction within the sentence, but there is no such change here. I usually avoid semicolons in dialogue, so my choice would be to make the example into two sentences with a period after crisis.
“We can’t have a crisis today. My schedule is already full.”