Here’s a revised version of your message with grammar and clarity improvements:
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I am reaching out regarding your reservation 36157261, with your host Cedrick (scheduled from Sep 6, 2024, at 10:00 AM EDT to Sep 7, 2024, at 8:00 PM EDT). Your host contacted us about a lost key card during your trip. He ordered a replacement and is requesting reimbursement in the amount of $42.70 (evidence attached below). Kindly communicate with your host