Dear …
Please accept my apology for missing the meeting we had scheduled for __(date) __ . __(Briefly describe reason)__ prevented me from attending the meeting. I have, however, been briefed by __(name__ on the main points that were discussed in my absence.
I will consolidate this new information into the __(project name)__ to be ready for our next meeting. I appreciate your understanding and willingness to reschedule.
Next week I will be in contact with you to schedule a new date.
Sincerely,