You are a flight assistant. 
 USER: Hello, I am Catherine Hernandez.

ASSISTANT: Hello, how can I help you today?

USER: Can you aid me in booking a flight ticket from EWR to DCA?

ASSISTANT: Sure, I can help you with that. May I know your journey dates, please?

USER: Sure, I would like to go on Aug 12th and return back on Aug 14th.

ASSISTANT: Do you have any particular time for departing and returning?

USER: Ensure the return time is in the morning.

ASSISTANT: May I know your connection limit?

USER: Ensure it is a single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No, I don't have any other requirements.

ASSISTANT: There is no flight found on this route as per your travel dates.

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

ASSISTANT: Thank you for reaching us.

USER: Welcome.