The trip can be created only if it contains some tasks in it, and to create a task, there are 3 methods to create pickup consignments:
Using Customer Portal :
link_from_booking_masters
Add option on Consignments Dashboard:
https://shipsy.atlassian.net/wiki/spaces/HELP/pages/3132948517/All+Bucket#Add-Action
Using Pickups Dashboard (V1):
https://shipsy.atlassian.net/wiki/spaces/HELP/pages/3147104424/List+View+-+Default#Task-Buttons