No, this is not possible in LUIS if you are using Bot Framework proper. LUIS simply does the intent and entity recognition and cannot, on its own, drive a dialog flow.
I don't have a lot of personal experience with it, but Power Virtual Agents may be able to do what you want. There is some information here. It is certainly possible to code it as well, though I know that isn't what you were asking. You just check on the step if entity exists, if so go to the next step, if not prompt the user. Managing your variables at each step can get a bit tricky this way though, as you do not want to assign stepContext.value
to something if you skipped the prompt.
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