At the beginning of the workflow add a custom function that calls your backend webhook that returns the customer's first name. The webhook recieves data from Retell like the caller's phone number etc. https://cdn.discordapp.com/attachments/1186462578310910112/1470117556957217042/image.png?ex=698a212b&is=6988cfab&hm=329e9c1ec2ba79e1dd371f94d48b98652a17c167b056b1581b1deff9306ac9c1&