Sorry for the late reply. Unfortunately this would require a custom functions for looking up the user id from the name you type in as the value accepted by a people picker when writing to it with this method is the user id and not the name.
The date must also have its own custom function / date picker as the format must be ISO8601 like this: “2017-09-20T20:15:00”.
Unfortunately I’m a bit behind on other things and cannot help you with this now.
Maybe someone else has already made this and are willing to share it here?
Alexander