How to send notification to user on Declined shipment that shows the declined carrier?

Summary:

We have an agent to send notification to CSR when shipment is declined. However, that notification is showing the next planned carrier vs the carrier that declined. How can I have the declined carrier included in the notification

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

25A

Code Snippet (add any code snippets that support your topic, if applicable):