Check purchase facts, compare invoices, request missing proof. Every one is ready to run, and you can adjust it in plain language.
Draft client responses from the message thread and guide.
Get a reply draft in the same chat thread, with unclear facts called out so you can review the wording before you answer the sender.
Draft client replies that keep prior requests in view.
Get a reply draft in the original email conversation when you're unsure what to say, with the earlier exchange taken into account.