Troubleshooting AI Agent Email Responses for Meeting Scheduling

I want to use an AI Agent that can converse with a lead via email until a meeting date/time is confirmed. I want the agent to reply back and forth with the lead to find a suitable time, so I've added the 'send email' skill, and the agent will observe and monitor for replies, but then reply in a fresh new email (opposed to replying in the chain). But it will add "Re: " to the subject line (despite it not being a reply in the email thread). Am i doing something wrong? I see that when I add the 'send email' action in a lindy, i can then add the 'send reply' action, where it will reply within the same email thread, but i cant find a way to add this capability to an AI Agent