M: Didn't you say you were [ came ] from Hiroshima?
F: Yes, I was born in California, but I grew up in Hiroshima.
M: No kidding! I'm from California myself. -- Comma not needed.
No. 2
M: Where's the emergency hospital [ room ]? -- In BrE we would say "Where's casualty?" I'm not entirely sure about AmE usage, but "emergency hospital" doesn't sound