Hi,specifically... I own a travel website and I want customer enquiries to go directly from my site to a number of hotel sites. I want those sites to 'talk' to my site and come back to the client whilst they are still online and confirm if they have availability or not and if so, take them through to a full booking form. I know that finance companies do this with mortgages and insurance leads but I'm not sure how to do it. I am pretty good with html, css and a fair bit of PHP but I just don't get API's at all. Can anyone point me in the right direction please? Thanks.