"Certainly, sir."

Jarvis connects the call and broadcasts the audio into Tony's room so the boys can listen in.

"You've reached the Stark residence," he says pleasantly.

A slightly concerned female voice replies, "You left a message earlier about Mr Stane's condition. Is he still not taking calls?"

"That's correct."

One very good reason to have Jarvis field this conversation: his voice doesn't waver with the lie.