Let me know what you think and any feedback you have.
I believe anyone should be able to submit their reservation, along with credit card details. If you do find the cheaper rate somewhere, you charge them at that point and present with the offer.
BTW, A typo: we can try to ehysave you money.
As for the automatic it is partially automatic. As we're gauging interest right now we haven't fully automated it.
For the pricing we're looking into different options such as taking only a %'d of amount saved, only charging if we save you money, etc. We'll be doing some testing in the very near future on different pricing models.
That said, if you have the data for it, it would be awesome to show some proof that this is a widespread thing - that prices do fluctuate regularly and there are these drops in price people can take advantage of - if they are using your service. I think that would help your case.