You need to have a White Guild card (highest level) and then you get 1 Ticket per 100 friendship points.Guild card leveling is as follows:

Start with: Paper

Clear 70 different quests: Wood
Clear 122 different quests: Leather
Clear 167 different quests: Metal
Clear 192 different quests: Gold
Clear 271 different quests: Black
Clear 356 different quests: White

All elder and guild quests do count (no Training or Treasure hunting). There are 396 total quests available.

there I now have the white one.