You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Jonathan Brown. Can you any flight is available on 08/30 to 09/01?

ASSISTANT: Sure, can I know the airport codes please?

USER: My source is DCA and destination is ORD. I need a connecting flight.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry, there are no flights with 1 connection.

USER: No issue, thank you for checking.

ASSISTANT: You are welcome.