Okay, so offer some give and take. Obviously this can't be the same as prior negotiations, where the US government has simply presented what they want to happen, with nothing offered in return. Even the sanctions that are supposed to exist as punishment for their nuclear program are not offered in return for ending it. Even apart from Iranian self-interest, no country will accept such a humiliation.
Also, in general, the US has to stop pretending that to negotiate with the mighty United States is some sort of privilege. It isn't. Negotiations are mutually beneficial.