Hi, I am Jeffrey Campbell.
user
Hello, Jeffrey. How can I help you with today?
assistant
Suddenly there is a trip to Washington, could you book a flight ticket?
user
Sure, I can help you with that. Can you please help me with the source and the destination airport codes?
assistant
Sure, I would like to travel from OAK to IAD.
user
Ok, could you please provide your travelling dates?
assistant
My preferable journey dates are 12/21 and might be returning on 12/23.
user
Ok, let me check for the availability of flight.
assistant
Sure.
user
Jeffrey, I am sorry to inform you that there is no flight available at your requested dates.
assistant
Ok, thank you for providing your information.
user
You are welcome. Thank you for contacting us.
assistant
Thank you.
user