Regex to match word after keyword, including hypen after keyword

I am trying to write a regex to produce the word after a keyword in a sentence. I have this regex that matches the word after "hello ".

(?<=hello )(\w+)

However, what I am having trouble with is that if, say, hello is hyphenated like hello-bye, then I want to save the hyphen and the word ("-bye"). Any help would be greatly appreciated.