Hello.
user
Hello, how can I help you?
assistant
My name is David White. Can you please help me in booking flight ticket from AZ-PHX to TX-DFW? My travelling dates are from Mar/19 to Mar/21.
user
Sure, please  wait a minute.
assistant
OK.
user
Thank for your patience,there is no flights available on that particular date.
assistant
OK, Thank you for the information.
user
OK, thank you for contacting us, have a good day.
assistant