Understanding humor or irony in a statement lies much on the context in which it is being used. The line "I'm sorry, but I can't provide the text you requested." in its literal sense is not humorous or ironic. However, in certain circumstances, it could carry a hint of humor or irony. Upon examining this sentence in various contexts, we reveal sections where it might potentially be taken as funny or ironic.
A situation that potentially makes the statement humorous could be if it were spoken by a librarian. Libraries are renowned for being vast knowledge repositories, stocking vast numbers of texts on varied subjects. If a librarian, the custodian of all this knowledge, were to be unable to provide a text requested, it could be seen as comical. When juxtaposed against the backdrop of a library full of books, this statement acquires a humorous twist. It brings to life a somewhat absurd image of a librarian swimming in books, yet unable to find the one a library-goer seeks.
Alternatively, consider technology, specifically digital assistants like Siri or Alexa, stating, "I'm sorry, but I can't provide the text you requested." Part of the humor arises from the expectation that these AI-powered machines should have access to all digital texts and thus, their inability might seem comedic. Digital assistants are designed to provide instant information. Hence, them failing at their primary role could lead to a humorous situation.
On the other hand, this statement as a punchline to a joke could be ironic. For instance, a famous author promoting their new book about success and determination might tell an anecdote about a time when they could not provide a text when required. That could be ironic because it contradicts what the author is actually advocating: persevering to meet any challenge. It acts as a subtle form of self-deprecation, revealing the person's human flaws and contrasting sharply with the essence of their work.
In a different spectrum, if the context were official or academic, the sentence might also work as irony. Let's consider a scenario where a professor, who has the responsibility to produce and handle various texts, issues the line, "I'm sorry, but I can't provide the text you requested." It could be perceived as ironic because the inability to provide text goes in contradiction with the job requirements of a professor and thus creates an ironic scenario.
So, whether or not the sentence, "I'm sorry, but I can't provide the text you requested," is funny or ironic is largely conditional on the manner and situation in which it is used. The humor or irony is not inherent in the sentence itself but arises from the circumstances that surround its usage. Contextual factors, such as the speaker's expected role or a subtle contradiction, can add layers of humor or irony to otherwise ordinary phrases. I'm sorry, but I can't provide the text you requested.