I need to find a flight form San Francisco to Chicago
On what day do you want the plane to arrive?
the 21st
I've found a flight that matches your criteria, should I try to reserve a seat for you on it?
sure can you see if its id 783
Can I have your flight ID, please?
783
May I have your name, please?
Susan
Sorry, but the flight with id '783' is not available any more.
What is the weather in Chicago on the 22nd?
It will be Cloudy all day on Thursday in Chicago, with temperatures of around 27 degrees celsius.
ok the book the flight any day but the 22nd
I've found a flight with the ID 178 on the 20th, should I reserve it for you?
yes 
I'm sorry, but your reservation request was unsuccessful.
ok then maybe a different day
Unfortunately there are no flights that match your search. Would you like to change any of your criteria?
no that's fine I will wait
Is there anything else that I can do for you?
no thanks goodbye
Thank you and goodbye.