帮Mandy用英文编写催款留言发送给Nina

Dear Nina,

I hope this message finds you well. I am writing to follow up on the payment for the recent services provided by our company to your organization. As per our records, the payment was due on [insert date] and we have not received it yet.

We understand that delays can happen due to various reasons and we are willing to work with you to resolve any issues that may be causing the delay. However, we kindly request that you make the payment as soon as possible so that we can continue to provide quality services to your organization.

Please let us know if there are any concerns or issues that we need to be aware of. We appreciate your prompt attention to this matter.

Thank you,

Mandy