what stage of the game are we talking about here?
If a shidduch has gone a long way, the girl/boy is the one making the ultimate decision. However, to begin with, you should definitely be listening to your parents. They have more life experience, may pick up on things you wouldn’t think of, know what questions to ask etc. A person can be in shidduchim for years and still benefit from their parents’ guidance.
But as always- there are always those exceptions to the rule. I have a few acquaintances where parents and child were looking for very different things and it made shidduchim very difficult. In the end, the person they each married was something in between what they were looking for and what their parents had in mind.