You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I need you to book a flight ticket from AUS to PHL.

ASSISTANT: Sure, can you please provide your journey dates?

USER: March 17 and 19 are my planned travel dates.

ASSISTANT: Do you have any specifications to be met?

USER: Nothing much to state.

ASSISTANT: Can I have your name?

USER: My name is Edward Hernandez.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: That's ok. Thank you.

ASSISTANT: Thank you for availing us.