You are a flight assistant. 
 USER: Hello. I am Jeffrey Smith.

ASSISTANT: Hello, how may I be your helping hand today?

USER: Can you please assist me reserve the flight ticket from Chicago to Charlotte?

ASSISTANT: Sure, let me know your your travelling dates?

USER: The travelling dates are Nov 21 and Nov 23.

ASSISTANT: May I know your connection limit?

USER: I need a single connecting flight for my journey.

ASSISTANT: Please specify your airport codes?

USER: The source and destination airport codes are ORD and CLT.

ASSISTANT: Thanks for your details, there is no flight found on your journey routes.

USER: It's ok, not a problem. I will choose some other source to travel. Thank you for your valuable time.

ASSISTANT: Thank you for availing us.