You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Please reserve me a flight ticket from DCA to PHL.

ASSISTANT: Sure, let me know your travelling dates.

USER: My travel dates are Jan 16 and Jan 18.

ASSISTANT: Can you please share your connection limit?

USER: I prefer connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I would like to return back in the afternoon time.

ASSISTANT: May I know your name please?

USER: I am Jeffrey Jackson.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.