Dear {{$employee_name}},

After reviewing your leave request from {{$start_date}} to {{$end_date}}, I regret to inform you that we are unable to approve it at this time due to {{$reason}}.

Please feel free to discuss alternative dates for your leave, and we will do our best to accommodate them in the future.

Thank you for your understanding.

Best regards,

{{$sender_name}}

{{$designation}}