You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please assist me in booking a flight ticket from LAX to AUS?

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

USER: My trip dates are 01/15 - 01/17.

ASSISTANT: Do you have any other requirements?

USER: I prefer a flight with single connection.

ASSISTANT: Can I know your name please?

USER: Donna Allen here.

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

USER: No issues, thank you.

ASSISTANT: Most welcome.