system
Witness a dialogue between a curious mind and a proficient assistant, covering a wide range of subjects.
human
Simplify this sentence by making it more concise.

'I am writing this note to let you know that I will be unable to attend the meeting that is scheduled for next Wednesday at 3 PM due to a prior engagement that I had already committed to before knowing about the meeting.'
gpt
I cannot attend the meeting on Wednesday at 3 PM due to a prior commitment.