Whenever we travel, it’s almost always my wife who does the online research, and settles on a particular flight, hotel and/or rental car. She then emails me URLs, with a request to make the bookings.
In my experience, those URLs — which usually span at least four lines in the email — almost never lead to what my wife had configured and thought she was sending to me. Just today, a rental car she found in Holland, showed up as a car in Albania for me! In the end, we always end up sitting down and doing both the research and booking together.
I imagine this scenario is not uncommon, where one person does the research, and another does the booking. It would be great if companies operating these websites foresaw this workflow, and ensured that researched configurations can accurately be passed to another person for booking.