Goal: Task 09939: You want to find and it should serve vegetarian food. You don't care about the price range. If there is no such venue how about vietnamese type of food. Make sure you get the address of the venue.

user: I am looking for a restaurant serving vegetarian food. 

system: we do not have any restaurant serving vegetarian food.  Can I help you with anything else?

user: Can you look for Vietnamese restaurants then?

system: Thanh binh serves vietnamese food. They are located at 17 Magdalene Street City Centre. Would you like more information? 

user: No, thank you.

system: Goodbye.

user: Goodbye. 

system: good bye.