TextAutocomplete field allowing also missing value

Hello,

in a form application I need to have an autocomplete text field called MYNAME, which search into a table populated with people names.

MYNAME should accept one of values present in the underlying table, guiding user while typing, but also accept a custom value missing in the underlying table.

For instance: suppose table name is composed by four records:

Aldo,
Giovanni,
Giacomo,
Marco

While typing into MYNAME I want to search one of the above four records , but if no match is found, I want MYNAME to accept a missing value, like Paolo

That is not the nature of this field as far as I know. Not being using this kind of feature much so I don’t know if you can combine, but you would need a small application link button to a form that allows adding data.