My business is Hotel & Travel booking. Some payment gateway like 2Checkout do not provide service to this industry. Someone help me please.
You could find payment gateway with 3PP, I hope this will help you to find a payment processors; http://electronic-payments.co.uk/product_data.jsp
2checkout is not a payment gateway. They are a third party processor. Authorize.net and Verisign are examples of payment gateways. Do you need a gateway? Or a third party processor?
WIth travel, the only option you have is to use an offshoer merchant provider. There are no US based merchant accounts, or 3rd party processors that allow travel. It's too high risk of business type for any 3rd party processor to accept, as far as I have ever heard.