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I just wanted to follow on/ after/ up what we discussed about the new products.

Unfortunately we are unable to make a donation to your organisation due to budget problem / limit/ constraints.

I was sorry/ afraid/ unhappy to hear about the damage to the products that you received this morning.

After careful/ a lot/ slight consideration we have decided not to go ahead with the conference given the current circumstances.

We are preparing/ willing/ want to work with you to find a mutually satisfied/ beneficial/ win-win solution.

Regarding the documents you requested, I am waiting/ awaiting/ requiring the final approval from my supervisor.

I would be grateful for your advice regarding this topic/ matter/ material.

I suggest you contact/ to contact/ contacting the client directly about possible compensation.

I would appreciate it if you could call me at your earliest moment/ as possible/ convenience.

Please keep me updated/ posted/ informed about the progress of the project.

We have taken special care/ attention/ caution to make sure that the items are exactly as you requested

I sincerely wish/ hope/ would like you agree to participate in the upcoming conference.

I am writing to confirm/ inform/ affirm you of our decision.

Please confirm your decision during/ by/ within the next 24 hours.

I am afraid something urgent has come up/ along/ out and I won't be able to assist / go / attend the meeting.

I can now confirm that the goods have been shipped and should arrive/ reach/ deliver you within 10 working days.

The documents will be emailed to you until/ by/ within the end of the day.

Once again, thank you for your quick replying/ response/ reaction.

I am afraid/ regret/ unhappy that we cannot accept/ except/ have any responsibility for the delay.