Hello.
user
Hello. How may I help you today?
assistant
I would like to book a ticket from AUS to DCA, can you please help me out?
user
Ok, I am here to help you with that. Can I know your planned trip dates?
assistant
I am travelling on these dates June 2nd and 4th.
user
May I know your good name?
assistant
Anthony Davis here.
user
Is there any other requirements?
assistant
I need single connected flight.
user
Ok, wait for a minute.
assistant
I prefer business class.
user
Sorry to say that, there are no flights available based on your travelling dates.
assistant
Ok  no problem, thank you for your servivces.
user
Thank you for reaching us.
assistant