You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you help me in booking from CLT to LAS?

ASSISTANT: May I know your desired travel dates please?

USER: My trip dates are Feb 24-26.

ASSISTANT: Do you have any specifications?

USER: I am looking for a direct flight.

ASSISTANT: May I know your name please?

USER: I am Karen Moore.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: No issue, thank you.

ASSISTANT: Thank you for opting us.