Your response must contain at least 3 placeholders represented by square brackets, such as [address]. Your response should be in the form of a letter, and it should include a greeting and a closing. The letter should be about confirming a reservation at a hotel. Include the hotel's name [hotel_name], the reservation number [reservation_number], and the check-in date [check_in_date] in your letter. Finish your response with this exact phrase "Looking forward to your stay at [hotel_name]."
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