You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking from AUS to PHL?

ASSISTANT: Sure, may I know your trip dates please?

USER: My travelling dates are from Apr 11 to Apr 13.

ASSISTANT: Do you have any other requirements?

USER: I need a connecting flight.

ASSISTANT: Can I know your name please?

USER: My name is Daniel Parker.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: Ok, No issues. Thank you.

ASSISTANT: Most welcome.