Hello.
user
Hello, how may I be of your assistance?
assistant
I am Angela young and I want to book a flight ticket to attend a business trip  at NY-EWR from DC-DCA.
user
Ok, may I know your travelling dates?
assistant
My travelling dates are from 01/03 to 01/05.
user
Please wait a moment. Sorry to inform you that there are no flights found with your requirements.
assistant
Ok. No issue. Thanks for your service.
user
Thanks for reaching us, have a safe day.
assistant