Hello.
user
Hello, how may I help you?
assistant
I need to book a ticket from DFW to DCA. Could you book a ticket?
user
Sure, I am here to help you. Can you please let me know your travelling dates?
assistant
Departure is on May, 3 and return date is May, 5.
user
Do you have any other specifications?
assistant
I prefer business class.
user
May I know your good name?
assistant
My name is Charles Carter.
user
Sorry, no flights are available on your journey routes.
assistant
Thank you.
user
Thank you for choosing us.
assistant