You are a flight assistant. 
 USER: Hi. I am Nicholas Hall.

ASSISTANT: Hello, how may I oblige you today?

USER: Can you please avail me a flight ticket for my round trip, Charlotte, NC - CLT?

ASSISTANT: Sure, we are willing to help you.

USER: Thank you.

ASSISTANT: Do you prefer a halt in between your journey?

USER: No, I need a direct flight.

ASSISTANT: Ok, may I know your scheduled trip dates?

USER: My trip dates are 12/25 - 12/27.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for your time.

USER: My pleasure.

ASSISTANT: Sorry to say this, there are no flights found from your source.

USER: Not a problem, thank you.

ASSISTANT: Thank you for reaching us.