You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am planning to visit the Wynn Las Vegas Casino which is located in Las Vegas, LAS. Can you avail me to book a flight ticket?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: My travel dates are Jan 19 and 21.

ASSISTANT: Can I know your source airport code?

USER: My source is from Charlotte, CLT.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Ok, thank you.

ASSISTANT: Can I know your name?

USER: Robert Parker.

ASSISTANT: Thank you for reaching us.

USER: Thanks for the information.