You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Can you help me to book a flight ticket from AUS to PHL?

ASSISTANT: Sure, can you share me your trip dates?

USER: Oct, 3 and Oct, 5 are my trip dates.

ASSISTANT: Do you have any specifications?

USER: I need direct flight.

ASSISTANT: Can I know your good name?

USER: Charles Harris here.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.