Confirm an oral agreement

Sample 1:
So we all have the same understanding, I have drafted this letter to confirm our decisions on the telephone at 11:15 a.m., November 24, 2001. We decided that:

Please call me immediately if you have any concerns about these decisions. Otherwise, please sign, date, and return the enclosed copy. We value your contributions and want you to feel good about working for Doe Corporation.

Sample 2:
This letter is to confirm the terms of our agreement made yesterday over the phone. As I understand our conversation, I am to supply additional top soil, grade your front and back yards, and install a Waterbird sprinkler system #1234 in both yards. You will pay me $1,500.00 upon completion. Finally, you want me to start on Monday, May 6.

If this accurately reflects your understanding, please sign your name in the space below and return the original to me in the envelope provided. I look forward to working for you.