You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: I am Samuel Williams. I would like to visit Carolina Harbor in Charlotte, CLT. Can you please book a connecting flight  for me?

ASSISTANT: Sure, may I know your boarding point?

USER: My boarding point is Washington, IAD.

ASSISTANT: Could you please provide me your depart and return dates?

USER: My depart and return dates are, 07/31 and 08/02.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: Ok, no issue. Thank you for your information.

ASSISTANT: Thank you for opting us.