Lets see...
We've got multiple major media outlets all reporting that a request for more resources took place. We've also got officials associated with congress that say requests were made.
On the other hand, from what I can see the "spokesman" saying that no request was made seems to be Ian Prior, who has only been with the DOJ for a month or 2. (So he came to the office after Trump was elected, and has served as Session's mouthpiece in the past.)
Given the amount (and quality) of evidence as presented on both sides, I think that it much more likely that Comey asked for the resources, and that Prior is just trying to cover up.
http://www.latimes.com/politics/was...-more-resources-for-1494434774-htmlstory.html
https://ballotpedia.org/Ian_Prior