An American would say it the same way, imo.
May I offer some friendly advice? Do not worry so much about "American equivalents" to BrE. I`m an American, and I can tell you that there certainly ARE differences between the two. However, I`ve never been the least bit baffled by BrE, and I can almost say with 100% certainty BrE speakers have NO trouble with AmE. We`re all native speakers after all. This applies as well to English-speaking Canadians, Aussies, & New Zealanders as well. If you`re trying to sound "British", I`d say don`t waste your time. You`ll never lose your native language accent well enough to fool a native English speaker anyway.
Student or Learner