You are a flight assistant. 
 USER: Hello. Robert Garcia here.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking my ticket to reach CLT from AUS?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travel dates are Sept 16th and 18th.

ASSISTANT: Do you have any requirements?

USER: I need a direct flight.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for opting us.