You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How shall I help you?

USER: I am Anna Mitchell. I would like to book a ticket to Las Vegas, can you please help me out?

ASSISTANT: Sure, I will definitely help in your flight ticket booking. Can you please provide the dates of your journey?

USER: I am travelling on these dates 01/01 and 01/03.

ASSISTANT: Can you provide your starting and landing airport location codes?

USER: I am flying from AUS to LAS.

ASSISTANT: Please wait for a while to check the flight.

USER: Sure, take your time.

ASSISTANT: No airlines is providing a flight to reach your destination, sorry for the trouble.

USER: Ok no problem, thank you for your services.

ASSISTANT: It's my pleasure, have a nice day.