Technically canter/lope is the same gait, but lope is used in western and much slower than an english canter.
I would heed caution about just holding one back to get a decrease in speed, you may get slowed down but will end up with hind legs dragging out behind. Hold light pressure on the bit, but add leg, this will drive hind legs underneath and help collect and get the horse on the bit not just slowed down and will keep from breaking down into the trot.
Life is like a camera. Focus on what's important, Capture the good times, Develop from the negatives and if things don't work out, Take another shot.