In your chatbot library, click into the chatbot you want to change.
Then at the top left, click "Manage Chatbot". From there, you can alter the base prompt your Dropchat is using in combination with your external data sources.
By default, your Dropchat bot is being instructed to be a helpful customer support agent.
Click into the "Custom Prompt" field to edit it to your liking.
Below is an in-depth guide from OpenAI on how to engineer your prompts for optimal responses.
Here is a link to a guide from OpenAI on how to engineer your prompts exactly to your liking.