Step1: Each webinar has some tools with it. The second tool reads 'Edit webinar details'. Click on it.
Step2: Click on the 2nd last tool indicated below reading 'Simulated CTA'
Step3: Click on 'Add Simulated Chat'
Step4: Enter the chat name, chat email, chat message, chat trigger time (In Minutes) and chat trigger time (In Seconds) and then click 'Save Chat'