Hello.
user
Hello, may I know how best I can help you today?
assistant
I am Laura King need to book a ticket to DCA  from OAK, can you please help me in booking?
user
Sure, can you please share your journey dates that you prefer to travel?
assistant
My preferred dates are from Mar 18 to Mar 20.
user
Do you have any other requirements?
assistant
I would like to travel in business class with single connecting flight.
user
 Thanks for sharing your details, we are unable to provide flight in between your journey routes due to heavy snowfall at destination airport.
assistant
Ok, no problem. Thank you.
user
Thank you.
assistant