You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Please help me in booking from DCA to CLT?

ASSISTANT: Sure, please share your trip dates?

USER: My travelling dates are from Aug 22 to Aug 24.

ASSISTANT: Let me know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Any other preferences?

USER: I want to depart in evening in economy class.

ASSISTANT: Can I have your name please?

USER: My name is Sandra Green.

ASSISTANT: Sorry Sandra Green, no flights found with your given details.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for reaching us.