I am looking to create a website that lets users
click a button to start an audio conversation with somebody else
who also clicks the button in his own browser.

so this has to be a match-making system
that lets people wait in a queue
until somebody else also tries to start an audio conversation, and then matches the 2 and
ideally starts an audio call that will be automatically recorded and send as .mp3 to
a server. is there a cloud-service for this?

summarizing: wait until 2 users click the "start call" button,
and then automatically start the conversation between the 2 members,
and then automatically record the call and send it to a server.

is there anything out there that will do this for me?
maybe you know of cloud-based tools that perform 1 or 2 of the functions i described above.

Thank you very much.