You will find this option in Tour setting.
Additional Example:
Creating Custom Package: https://www.youtube.com/watch?v=obQagPhRQl8
Creating Group Package: https://www.youtube.com/watch?v=wRdxXlWE2fk
Setup different prices on different date: https://www.youtube.com/watch?v=0JbytES3GOk
How the seat work in the tour system: https://www.youtube.com/watch?v=9U2TloA2gD8
How to set discount on a tour: https://www.youtube.com/watch?v=TmRZYuuTYcc