FYI Your ETA Is TBA, So TTYL

(I am dealing with a pushy customer; he’s submitted a trouble ticket but called in less than two minutes asking for an update.)

Me: “Sir, I am unable to give an ETA at this time. I am still looking into this issue.”

Customer: “So, you cannot give me an ETA?”

Me: “No, I am unable to give an ETA at this time.”

Customer: “When can I get an ETA?”

Me: “Sir, are you asking for an ETA on the ETA?”

Customer: “Yes!”

Me: “I will let you know when there are any further updates…”