Hello.
user
Hello. How can I  help you?
assistant
Charles Smith here. I want to attend a Seminar in Oakland. Can you please help me for booking the flight ticket?
user
Sure, may I know your airport codes please?
assistant
My airport codes are AUS and OAK.
user
Your travelling dates please?
assistant
My travelling dates are 06/01 and 06/03.
user
Do you have any specifications?
assistant
I want to return on evening. I need single connecting flight.
user
I am sorry no flights found on your route.
assistant
Anyway, thanks for the information.
user
Thank you for choosing us.
assistant