The Details are Everything

The receptionist calls the office and says "Office, Mr. Client is here."

Super powerful agent says "Kid, go get the client!"

Kid goes to the reception area. There is the client and his entourage. Kid says "Mr. Client, Miss So-and-so, Mr. Such-and-such, please come with me."

As the kid turns the corner, there is fire in the eye of the agent.

What did the kid do wrong?