Hi.
user
Hello.
assistant
I am Katherine Hernandez.
user
Katherine Hernandez, how may I aid you?
assistant
I need to book a flight ticket from DCA to OAK, Can you please help he for booking?
user
Sure, please share your itinerary dates.
assistant
I would like to travel on 11/18 to return on 11/20.
user
Do you have any specifications?
assistant
I need a  connecting flight.
user
At what time do you want to travel?
assistant
I would be return on afternoon.
user
Please hold on for a while.
assistant
Sure.
user
Sorry, no flights are available on your route.
assistant
Ok, no problem. Thanks for your information.
user
Thank you for choosing us.
assistant