Anna,
Thanks for your e-mail.
And I'm sure that it was on Wednesday that I sent the last e-mail to you about Project **, which I have attached to the e-mail. And I didn't send any e-mail to you yesterday.
It's a pity that I won't be in charge of all the e-mails about Project **, and I feel so sorry for inconvenience I brought to you because of my carelessness in my work. Also it is a pleasure to cooperate with you.
Best wishes.