"You people" especially to Americans will have racial connotations (it's often a racist way white people refer to black people) and should be avoided. It should not be used here. Colloquially "you guys" or "you all(=ya'll)" would be acceptable, but the answer should use the standard English use of "you" in the plural id est "Are you(pl) hungry?"
If you meet speakers of Indian English, they naturally address any group as "you people" or, if they are a member of the group, "we people." It's standard practice in their dialect of English, and shows the influence of Indic grammar.
It's better to get used to encountering the most prevalent forms used in Indian English than to insist on American or British English as the standard. What an irony it would be to engage in cultural imperialism in the name of political correctness.
I want to register a note of disagreement on this point!
I think it is a bit of an overstatement to say that "you people" is often a racist way for white people to address black people. Since Ross Perot's 1992 speech, where he used the phrase in a dismissive way while speaking about black folks, it has been inadvisable for anyone to address a group of African-Americans as "you people."
"You people" is a natural phrasing in the form of English I speak, and it is not necessarily racist. I use it to address groups of people (my students) frequently.
"You (pl)" would be an acceptable and accurate alternative.
Being that I am a white person myself I should recognize that I may be blind to some elements of this discussion. The opinion of an African-American on this subject would be helpful.
While it is usually dismissive, the assumption that it is racist is quite recent. It is used dismissively of any group--I have heard it used of political groups, schools, families, etc. Of course, that does sound odd in this context, though I would only use "you" alone, or the various regionalisms you mention (I suppose you could add you'uns, youse, and a variety of others) if this is the standard way to make the second person plural.