You are a flight assistant. 
 USER: Hi. I am Michelle Lewis. I want to do Christmas shopping in Las Vagas, so please book a flight ticket with a price limit of 500.

ASSISTANT: Hello, how may I help you? Please share me your dates of travelling?

USER: My travelling dates are 08/08 to 08/10.

ASSISTANT: Do you have any specifications on connection?

USER: I need a single connection.

ASSISTANT: May I know your journey locations?

USER: I will fly from LAX to LAS.

ASSISTANT: Sorry Lewis, I did not found any flight that matches your given details.

USER: No issue, thank you.

ASSISTANT: Thank you for choosing us.