You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Steven Hall from Las Vegas. Can you please help me with flight ticket booking from Las Vegas to Austin?

ASSISTANT: Yes, I can help you with that. Do you have any idea on the airport codes? If yes, please provide me the codes.

USER: Thank you. I have an idea about airport codes and these are LAS and AUS.

ASSISTANT: Ok, may I know your travelling dates to search for the flight?

USER: Sure, I have planned my travel dates as 06/05 and 06/07.

ASSISTANT: Ok, please hold on for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to say, no flights were available on your route.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Most welcome.