You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to celebrate Columbus day with my friends at Las Vegas, NV - LAS. Can you book a direct flight for me?

ASSISTANT: Sure, please provide me jouney dates?

USER: I want to fly on 10/09. And I intend to return on 10/11.

ASSISTANT: May I know your good name?

USER: I am Ashley Jackson.

ASSISTANT: Do you have any price limit?

USER: The price limit should be 1000.

ASSISTANT: Please also share me your destination detail?

USER: My origin is at Los Angeles, CA - LAX.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry to inform you there is no flight available.

USER: Ok, no problem. Thanks for your service.

ASSISTANT: Thank you, have a nice day.