You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gregory Green.

ASSISTANT: How can I aid you at this moment?

USER: I am planning to visit Las Vegas, can you please book me a ticket from CLT to LAS?

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates for booking flight ticket?

USER: My preferable journey dates are from 12/03 to 12/05.

ASSISTANT: Ok, please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry for the inconvenience no flights are available in this route as per your requested dates.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for reaching us, have a nice day Gregory Green.