Hello.
user
Hello. How can I help  you?
assistant
Can you please help me to book a flight from PHL to AUS?
user
Can I know your travelling dates?
assistant
My travel dates are Sept 19 to 21.
user
Do you have specification?
assistant
I prefer direct flight.
user
Can I know your name?
assistant
I am Lisa Hernandez.
user
Sorry, there is no flight with your travelling dates.
assistant
No problem, thank you for the information.
user
Thank you.
assistant