If you want to change court dates you should call down rite now and ask them. They are more than likely going to tell you to keep the date.
If you just have those 2 charges, you have nothing big to plea bargain with.. you might as well just go downtown to the second floor in the traffic building and pay the fine. No court then UNLESS it was marked mandatory on your citation.
Whatever you do, make sure you either pay it off early or show up to court on time