First Order: Laugh. Heartily.
... Really, what an impudent Elf. We will take it with humour. Once.
Second Order: Settle your Point of View
Being a Servant of Akatosh, the mortals know what to expect of us - a mission that most likely benefits nirn somehow in the bigger picture. The same is not something we can say about them. Any notion of us working for them is thus, well - refer to the first Order. Working together is something we can imagine and would agree to. Within reasons, that is. Yeah, sometimes the devil is in the detail.
Actually, maybe we might want to point out that - by working for the better good on nirn - we already work "for them". But we will not do so in "that order". So yeah, we still want to be polite and... somewhat friendly. But firm in maintaining (soon-to-be) superiority and independence.
Do this.Also, long term plans - eat the Eye of Magnus. Collect the Staff.
Grow front legs.
Do stuff the Dragonborn did, only better because we're a dragon.