Dear Felix
This will acknowledge our telephone conversation of this date. As was stated in our letter dated [date], we should be receiving our financing by [date]
In view of the above, we would appreciate your extending the date for our payment of the account until [date]. This will enable us to make sure that all of the appropriate documents have been prepared.
We appreciate your courtesies, past and present. It has been a pleasure doing business with your company and we look forward to years of pleasant associations.
Regards
Lydia