Critique the following closing paragraphs. How would you rewrite each to be concise, courteous, and specific?
a. I need your response sometime soon so I can order the parts in time for your service appointment. Otherwise, your air-conditioning system may not be in tip-top condition for the start of the summer season.
b. Thank you in advance for sending me as much information as you can about your products. I look forward to receiving your package in the very near future.
c. To schedule an appointment with one of our knowledgeable mortgage specialists in your area, you can always call our hotline at 1-800-555-8765. This is also the number to call if you have more questions about mortgage rates, closing procedures, or any other aspect of the mortgage process. Remember, we're here to make the home-buying experience as painless as possible.