Some suggestions of things to mention:
Where you are or want to go
How many people are going
How much time you have
Purpose of the vacation, dinner, etc.
Anything else you can think of
I also plan dinners, holidays and anything else you can think of. If you have an idea, but are unsure about the details or where to begin you've come to the right place. I will send you one itinerary and supplemental information and you tell me what you like and don't like. I will then send a revised copy. Additional revisions will be extra. I'm very serious about the quality of my work and will only take on up to three requests at one time.
I want to specifically mention that I am very good at putting surprises together and coming up with unique ideas for your significant other. However I realize everyone is different, so please tell me as much as possible about them, so I can make everything fantastic.