You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Please reserve me a flight ticket from CLT to LAS.

ASSISTANT: Sure, can I have your planned travel dates please?

USER: My travel dates are May 12 and May 14.

ASSISTANT: May I know your name please?

USER: I am Christine Thompson.

ASSISTANT: Do you have any connection preference?

USER: I prefer direct flight for this trip.

ASSISTANT: May I know your other specifications?

USER: No, thanks for asking.

ASSISTANT: Christine Thompson, no flights has been found on your planned travel dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.