You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: My trip dates are Apr 1 and Apr 3.

ASSISTANT: Can I have your good name please?

USER: Elizabeth Davis here.

ASSISTANT: Do you prefer to travel in direct or single connected flight?

USER: I prefer a direct flight.

ASSISTANT: Please let me know if you have any other specifications.

USER: I do not have any other specifications.

ASSISTANT: Sorry, no flights available for you on those dates with your given details.

USER: Not an issue, thank you.

ASSISTANT: Thank you for choosing us.