You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your good name please?

USER: I am Jeffrey Wilson. One of my friend has invited me to attend a VIVA Awards in AUS. Can you book a flight ticket from PHL?

ASSISTANT: Sure, may I know your preferable travelling dates?

USER: My preferable dates are 05/10 and 05/12.

ASSISTANT: Sorry, there is no flights found as per your travelling dates.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you.