Does an "AI messenger" exist?

Curious if anyone has found anything like this in their journeys: Instead of sending a big long email or document to a colleague and having them not read it, what if you sent an agent of sorts instead to deliver a brief message but also allow the receiver to ask detailed questions if they have any? The agent could be loaded with various docs / details that could be referenced if the recipient has follow up questions without having to go back to the sender.