Well, that's a good idea. "Waiter" really can't attract HR, and it doesn't sound good.

If you are still qualified for the whole activity, write "planning specialist", but according to your description, it is more appropriate to write "planning assistant".

If you are a waiter in a high-end place and have a high sense of service, writing "senior waiter" is also a high-end atmosphere, which is also good to listen to and attracts the attention of HR.