You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you aid me to book my ticket from AUS to PHL?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My trip dates are Apr 16 and Apr 18 respectively.

ASSISTANT: Do you require any stopovers in your journey?

USER: I prefer for a connecting flight.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: I prefer for normal cost airlines.

ASSISTANT: May I know your name please?

USER: Dennis Brown here.

ASSISTANT: Ok, please stand by.

USER: Ok.

ASSISTANT: Thank you for being patient, we didn't find any flights which matches your requirement.

USER: Thanks for the help.

ASSISTANT: Thank you for reaching us, have a nice day.