Training an Alice bit for this task (and similar marketing talks) should be relatively easy, especially because the marketer wants to stay on the line and will make allowances for wonky conversation.

http://alice.pandorabots.com/

http://alicebot.blogspot.co.uk/2013/09/mitsuku-wins-loebner-...

(Sorry for mobile links)

I'm surprised it hasn't already been done.