Can anyone solve this riddle...
Something in the following phone conversation makes no sense. What is it?
"may I speak to the manager, please?"
"who may I say is calling"
"Mr. Rominch"
"Could you spell that name, please"
Certainly. R as in Rome, O as in Oslo, M as in Madrid, I as in Innsbruck... "
"I beg your pardon, I as in what?"
"Innsbruck"
"thanks. Please continue"
" N as in Nome, C as in Cleveland, and H as in Helsinki."
"thank you. I'll connect you now."

Rome,Italy
Oslo,Norway
Madrid,Spain
Innsbruck, Austria
Nome, Norway
Cleveland, Ohio
Helsinki, Finland

All cities are in Europe except Cleveland.

I think the riddle is based on the heterographs of Nome and gnome which are pronounced the same way. Using either as part of a phonetic alphabet would be a very poor choice.