We were a bit surprised hearing MR CSRs from a call centre outside the US.
One incident was that I called to add an additional guests in a ressie, and the I keyed in Mr. Nacho's Gold number (automated line). Then when I talked to her, I explained to her that we have a ressie starting on june 2-6 at CY Basel. She said, 'I need the confirmation number'. I never have to give anyone a confirmation number when I call any hotel, so I replied very politely that I do not have it with me because I thought the date, guest name and the hotel should be enough. She actually insisted me to leave the phone and walk to my laptop and logged onto his e-mail to find his ressis no.
Maybe this is the standard procedure of Marriott, but I found it a bit ought as I don't normally need the confirmation number callling airlines or other hotels.
She didn't even warn me or even tell me that there was an extra charge for the additional guest! Fortunately we got the GM at the property to sort the whole thing out.
The number I called was 800 3217396, and I had to say 'operator', not sure I'm calling the right number.