Leeds' 3-0 defeat to Liverpool on Sunday leaves them with two points from their opening four Premier League matches.
On claims of second season blues, Dallas said, "A lot of people say that. It's easy to say that now, looking after four games we've got two points, it's easy for people to say that the second season's always difficult.
"We've had a tough start to the season, there's no getting away from that.
"We've got to start turning our performances into wins and hopefully that'll start next Friday at Newcastle.
"Of course a heavy defeat is never good, it's important that we use the performance.
"We won't change but we've got to be better at what we do. We've got to try and improve and be better.
"We can learn a lot from this, we can, but at the minute we're really really disappointed with the result."
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