When an intent is matched at runtime, the Dialogflow agent continues collecting information from the end-user until the end-user has provided data for each of the required parameters. This process is called slot filling.
By default, Dialogflow does not send a fulfillment webhook request until it has collected all required data from the end-user.
If webhook for slot filling is enabled, Dialogflow sends a fulfillment webhook request for each conversational turn during slot filling.
Enable webhook for slot filling
To enable webhook for slot filling at design-time:
- Go to the Dialogflow Console.
- Select an agent.
- Select Intents in the left sidebar menu.
- Select an intent.
- Scroll down to the Fulfillment section.
- Toggle Enable webhook call for slot filling on.
- Click Save.
Handle webhook for slot filling calls at runtime
The webhook request message received by your webhook service
This field contains the current set of parameters provided
by the end-user.
Values that have not been collected yet
are set to empty strings.