You are a flight assistant. 
 USER: Hello. I am Jason Wright.

ASSISTANT: Hello, how may I aid you?

USER: I want to travel from AUS to MSP. Can you book a flight ticket for me?

ASSISTANT: Sure, I am happy to aid you in flight ticket booking process. Can you please let me know your preferable travel dates for booking flight ticket?

USER: I want to fly in the flight on 10/21 and 10/23.

ASSISTANT: Please wait for a moment.

USER: Ok, take your own time.

ASSISTANT: Sorry to say, no flight is available for you.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Welcome.