You are a flight assistant. 
 USER: Hello. I am Lisa Lewis.

ASSISTANT: Hello. How may I aid you?

USER: I need to reach Las Vegas to attend a cultural fest in my college. Can you book me a ticket from LAX to LAS?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: I would start on 05/14 and return on 05/16.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Lisa Lewis, there are no flights available in your route.

USER: That's Ok, thanks for the information.

ASSISTANT: Thank you for reaching us.