Thats how it works in English.
You cannot translate directly from one language to another. What works in English isn't going to necessarily work in Polish.
In your above example what you need to say is " Damian wants to speak to you", because if a person is wanted by another, there will always be a reason why. That reason puts context into the sentence, and in Polish language, context is everything.
And he/she doesn't understand then i am afraid that is the Polish language's fault.
Sorry but it isn't. You are making the mistake of thinking you can directly translate from English to Polish. You are blaming the language instead of your own lack of understanding.
There is no need to say why in English.
But there is in Polish and this is what you need to understand.