Hi,.
user
Hello, Welcome to Lee Agency. How can I help you?
assistant
Please book a flight from Denver, CO-DEN to Denver, CO-DEN, for science festival.
user
Sure, may I know your travelling dates?
assistant
Depart by 03/16 and return on 03/18.
user
May I know your name?
assistant
My name is Michael Hernandez.
user
Sorry to tell that there are no flights found on your request.
assistant
Thanks for the help.
user