If there is a delay in response then must write an apology email in order to formally apologize for the delay in the response. This kind of apology email is supposed to be a simple draft which must include the apology along with the reason because of which the delay happened.
If you are finding yourself short of words then you can use the format for apology email for delay in response that you can use for creating your personalized email in a better and professional manner.
Format for Apology Email for Delay in Response
Dear Mr. Andrew,
Hope you are doing.
I am writing this email to apologize for the delay in responding to your requirements. I am writing this letter to personally apologize for this delay which happened because we were shifting our office to a new location and were keeping busy in making the arrangements.
I sincerely apologize for the delay and the inconvenience it must have caused you. I hope you will understand the reason in the delay and will trust our company with your orders. I will make sure that you never experience such delays in responses.
Thanking you for your time and consideration.