Translation of plenipotenciario

I grabbed a burger from an American fast food chain and swallowed it immediately, as I had not eaten for a while. I boarded the machine and could feel a slight stomachache but decided to ignore.
Sounds great. Sorry, it took me a while to get back to you. Did you book the Helmhaus (which Monica suggested) or the Seidenhof (which I gave her in the end)? Will make sure, they give you good rooms...
The ship stopped in the middle of several limestone islands and passengers went swimming in the middle of the sea. There were dozens of other boats around us as the area was very touristy.