I don't like that one at all, Karen. I find it very confusing. Sometimes people use "entertain" to mean "consider", but it seems very odd in this context. I suggest you use something else. "Addressed", "dealt with", or "considered" could all work depending on your exact meaning.
Can you tell me in other words what you are trying to say? If you can, then somebody will surely come up with a good suggestion.
I also agree with Owlman. "Will be entertained" has a tone of "we'll consider it", and that's not what a client making a request wants to hear. The client wants to hear addressed or dealt with, as Owlman suggested; handled is another possibility. The word should assure the client that action will be taken in response to the request.
I prefer "addressed," then "handled." I would avoid "dealt with" because for me it has negative overtones -- I "deal with" a request that I'm not happy about, the Mafia "deals with" troublesome people, etc.