You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Is it Central Booking Agency?

ASSISTANT: Yes, say what help are you expecting from my side?

USER: Can you book a flight ticket from AUS to LGA?

ASSISTANT: Sure, please mention your dates of trip?

USER: It's from 02/09 to 02/11.

ASSISTANT: Ok, please hold on for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no flight is available as per your respective details.

USER: Ok, no problem.

ASSISTANT: May I know your name please?

USER: Sure, my name is Brenda Clark.

ASSISTANT: Thank you for your information.

USER: That's ok.

ASSISTANT: You are welcome.