You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Please reserve a flight for me to travel from JFK to DCA.

ASSISTANT: Sure, may I know your travel dates?

USER: I will depart on April 4th and will return back on April 6th.

ASSISTANT: Do you need any stopover in between your journey?

USER: I am fine with one connecting flight.

ASSISTANT: Any other specifications to be met?

USER: No.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: No problem, thank you for your time.

ASSISTANT: May I know your name for documentation?

USER: My name is Nicole Harris.

ASSISTANT: Thank you.