You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: Can you please reserve me a flight ticket from DEN to CLT?

ASSISTANT: Sure, can you please share your preferable journey dates?

USER: My trip dates are 12/31 - 01/02.

ASSISTANT: May I know your name please?

USER: Katherine Miller here.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Is there any specifications?

USER: No, thank you for asking.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Not a problem, thank you.

ASSISTANT: Thank you for reaching us.