[jQuery] Autocomplete: How to prevent multiple queries(url) to the backend when there is no match

[Goblel]

I'm trying to use autocomplete to send a query to our backend search
engine. This is working very well, howver, we are notcing that when we
submit a query for a substring such as "foo" and there is no match in
the results a subsquent query is also been submitted for "foobar" to
the backend. This is resulting in unnecessary query traffic, because
if there is no match for "foo" no match can be expected for "foobar".
Is there a way to prevent subsquent queries from being submitted?

Thanks in advance!