I think it took the whole context of the converstion into consideration, you should create a new converstaion instead and see if it responds differently.
Or you could be more specific, like "Rephrase the following sentence: 'Are the original stated objectives still relevant?' in a formal way, respond with one option only."
Or you could be more specific, like "Rephrase the following sentence: 'Are the original stated objectives still relevant?' in a formal way, respond with one option only."