Apology Letter For Delayed Response

Dear {Recipient},

I apologize for not getting back to you sooner, I hadn't seen your email until now. So sorry for dropping the ball on this one!

I'll send the files you requested as soon as possible. Do let me know if you need anything else from me. I've turned on email notifications to make sure I don't miss any more emails from you.

If you'd like to meet for coffee and discuss the project further in person, I'm available next {day of the week} around {time}. Does that work for you?

{Your Name}