You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: My name is Cynthia Young. I am looking to book a flight ticket to visit Washington, can you help me for booking a flight ticket from CLT to DCA?

ASSISTANT: Sure, let me know your travelling dates?

USER: My travelling dates are Apr 26 and Apr 28.

ASSISTANT: May I know your connection limit?

USER: I need a single connecting flight.

ASSISTANT: Can you please share your your flight timings?

USER: My return time is afternoon.

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

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for availing us.

USER: Welcome.