I am looking for a cheap restaurant to have a meal.
Sure thing, do you have a type of food you'd like or a specific area you'd like to eat in?
The restaurant should be in the south, and should serve eastern European food if there is a restaurant like that.
I am sorry, there are no restaurants that meet that criteria. Can I help with anything else?
How about Portugese?
There is one, shall I book it for you?
What price range is that one?
This is a cheap one.
I need a table for 4 at 19:30 on Thursday. If that time is unavailable, please reserve for 18:30.
I have booked you a table for four people on Thursday at 19:30 at nandos. The reference number is X15NtNNN. Can I help you with anything else?
No, that is all the information that I needed. Thank you for your time.
Thanks for using our helpline. Hope you have a great day. 
Thank you! You too! Good Bye.
Bye, and have a great time at nandos!