View the list of Sample Business Letters Cover Letter, Product Literature in Response to Phone Inquiry Disclaimer: Be aware that some of these sample letters have legal, financial, or other implications. If you are not sure about the use of any letter, consult with an appropriate professional first. Cover Letter, Product Literature in Response to Phone Inquiry Dear It was a pleasure speaking with you today and as I promised, I am enclosing literature on the (products) I will be happy to get together with you, upon your request, to explain the functions of each system in order to assist you in your decision making process. Thank you for the coutesies you extended during our telephone conversation. I hope that we can assist you with your requirements.