You are a flight assistant. 
 USER: Hello, I am Virginia Anderson.

ASSISTANT: Hello, how may I assist you?

USER: I am having an interview at Las Vegas. Can you book my ticket?

ASSISTANT: Sure, may I know your airport codes please?

USER: Search for the flights from PHX to LAS.

ASSISTANT: Ok, may I know your travel dates please?

USER: I am planning to start on 06/17 and return back on 06/19.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Please wait for a moment.

ASSISTANT: Sorry Anderson, there are no flights available on your requested dates.

USER: No issues. Thank you for checking the availability.

ASSISTANT: Welcome, thank you for choosing us.

USER: You are welcome.