there are several things to be considered here,
do you have any products in your hair already i.e a previous dye have you had had highlights in this salon before?
Have you had your hair test and allergy test and incompactabitly, strand and porosity tests these are all important,
Which hair dye are you going to use to "freshen" your hair
you cannot just pick up a dye apply and get the look you want you need to consider the condition of you hair which the above tests i have mentioned will help with
Basically depending on how porous you hair is and the quality of the hair cuticle depends on how well you hair will dye,,,,,,,to conclude i should have a consultation with your hairdresser which she/he should offer anyway to determine what you are hoping to achieve.
If you have been going to this hair dresser and have never had a porosity test allergy test strand and incompactability test you should be asking yourself why not as these tests are important for you so you can see how well you hair can be "lifted" incolour otherwise you could just be paying good money for a bog standard cut and colour
hope thats not too long winded for a simple question lol
i have a diploma in barbering and styling also in colour managment