Real Bible Translation

And they questioned himself, "What then, is yourself He is my God [Elijah]? And he is saying, "I am not. Yourself is the Prophet" and he answered not.^37b

LITV Translation:
And they asked him, What, then? Are you Elijah? And he said, I am not. Are you the Prophet? And he answered, No.

ESV Translation:
And they asked him, “What then? Are you Elijah?” He said, “I am not.” “Are you the Prophet?” And he answered, “No.”

Footnotes

37b

The interpretation and placement of commas, quotations, periods, etc. truly depends on context. Taking again the dual nature into account, it can be seen as a dialogue between two selves. "The one who was, and the one who comes."

Greek Οὐκ εἰμί, "I am not."

Greek Ὁ προφήτης εἶ σύ (Ho prophētēs ei sy) translates to "You are the prophet" in English.

Greek Καὶ ἀπεκρίθη oὔ. And he answered not. Οὔ is a particle of negation. This form is found around 700 times, the vast majority of times it negates -- "not". For the text to have only "No" as dialogue doesn't fit with the overall linguistic and narrative patterns found in the NT. This would be the shortest spoken dialogue/answer/word/reply in the entire New Testament otherwise.