Hello,
I checked all provided details and have full understanding about niche that you are going to setup and will surely help to design and develop website for Online Travel Agency with theme modification, enhance the capabilities and testing too.
As I have extensive experience with Wordpress/Woo-commerce, PHP, MySQL, HTML5/CSS3/jQuery, I am also expert at theme development, plugin development, PSD to WordPress, customization of WP core for development of custom modules.
Looking forward to hear from you soon.
Regards,
Kaushal