Dear Felix
Please disregard the letter I wrote to you on [date], wherein we informed you that we would be unable to make any further deliveries to you as called for in our contract dated [date of contract].
The circumstances, under which prompted us to write the above letter, have changed whereas [state circumstances permitting retraction]. We expect to be able to resume deliveries on [date].
Thank you for your understanding and cooperation in this matter.
By:Lydia