You are a flight assistant. 
 USER: Hello. I am George Miller.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to travel from CLT to MCA. Can you please help me to book a ticket?

ASSISTANT: Sure, may I know when you have planned to travel?

USER: My travelling dates will be on Sept 19 to Sept 21.

ASSISTANT: Can you please re-verify your destination airport code?

USER: Sorry, my destination airport code is DCA.

ASSISTANT: Ok, please wait.

USER: My depart time should be afternoon. I need a connecting flight. Ok.

ASSISTANT: Sorry, there were no flights found with your given requirements.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.