You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Deborah Thompson here. During summer I would love to go to Las Vegas, so could you please book a ticket from LAX to LAS?

ASSISTANT: Sure Thompson, can you please provide me your travelling details?

USER: My preferable dates are 11/07 and return on 11/09. Please make sure the flight should not exceed 500 with single connection.

ASSISTANT: Please, wait a moment.

USER: Sure.

ASSISTANT: Sorry, we could not find any flight on your requirement.

USER: That's ok. No problem. Thank you.

ASSISTANT: Thank you for reaching us.