Hello.
user
Hello. How may I help you?
assistant
I need to book a ticket from DFW to CLT. Could you book a ticket?
user
Sure, on which dates you are planning to travel?
assistant
Trip dates are from Aug, 13 till Aug, 15.
user
Do you have any other requirements?
assistant
I prefer to travel in economy class.
user
May I know your name?
assistant
My name is Joseph Williams.
user
Sorry, there are no flights available.
assistant
Thank you.
user