Real "conversation" I had with a co-worker, after I left my desk and put on the auto-respond function:
mijhsan: I'm back.
Auto response from JDonahue62: Hi mijhsan, I'm unavailable at the moment.
JDonahue62: i'm back.
Auto response from mijhsan: Hi JDonahue62, I'm out to lunch.
JDonahue62: let's both sit back and let our IMs talk to each other.