Add "variants" to the "Tour"

Hello.

I purchased a TravelWP from Themeforest.
Everything works fine but I would like to ask if it would be possible to add “variants” to the “Tour”.

I want to have different prices for one “trip”.

I need to add “variants”:

04.07 – 15.07.2017 – price
15.07 – 30.07.2017 – another price
30.07 – 12.08.2017 – yet another price

Then it will be possible to choose the date, and the price will change on the product page (TOUR).

Please help.