Hi, Welcome to Just Answer!
The timing belt service is very important and can save you money in the long run. If the belt were to break, internal damage can happen and would cost you a great deal more than the less than 500.00 dollars it will cost you now. It will probably be around $360.00 for the job give or take some shop supply charges. Most full service auto repair centers can handle this job for you, no need to take it to the dealer. It is extremely important to have this service done to to maintain long engine life.
If you need further assistance let me know.
Auto Mechanic
17 yrs experience and currently own and operate an Auto Repair Center