Hi my name is Susan and I need to search for a flight from San Francisco to New York.
On what day do you want the plane to arrive?
Friday
What numeric date please?
15th
Right, I found a First flight with American for 481 credits
 that takes 2 hours to get to New York City.
great. I want to book flight ID 234 please.
May I have your name, please?
Susan
Sorry, but the flight with id '234' is not available any more.
Can I check the weather forecast for New York City and Pittsburgh for Tuesday please
It will be Snowing all day on Tuesday in New York City, with temperatures of around 3 degrees celsius.
What about Pittsburgh?
It will be Sunny all day on Tuesday in Pittsburgh, with temperatures of around 12 degrees celsius.
Sounds cold.
Is there anything else that I can do for you?
I don't know. What kind of weather do you like?
I prefer autumn, cooler temps. 
Me too!
Is there anything else that I can do for you?