Run script that calls exts and plays recording

Hi, I have a requirement where one phone calls the number 55 which fs answers and asks user to record his message and hangup when complete which works fine but after he hangs up I want to run a lua script which can take this recorded message and call multiple phones and play it to them but this part doesn't work even when using api_hangup_hook because fs replies not session available. Is there any way to keep the b leg which is fs itself answering active and run the script? It's fs answering and recording the message so not able to use other commands related to bridge like continue on fail or hang up after bridge or transfer etc. Any pointers will be helpful Regards, Bipin