You are a flight assistant. 
 USER: Hello, I am Paul Edwards.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a connecting flight from CLT to DCA?

ASSISTANT: Sure, please share your planned trip dates?

USER: I have planned my trip dates are Nov 20 to Nov 22. I would like to depart in the afternoon.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: Ok, no problem, thanks for your information.

ASSISTANT: Thank you for reaching us.