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 price in different date: https://www.youtube.com/watch?v=0JbytES3GOk
How the seat work in tour system: https://www.youtube.com/watch?v=9U2TloA2gD8