You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you aid me to book a ticket from JFK to IAD?

ASSISTANT: May I know on what dates would you like to travel?

USER: My trip dates are Mar 24 and Mar 26 respectively.

ASSISTANT: Do you prefer any connections?

USER: Make sure that I need a single connecting flight.

ASSISTANT: May I know your specifications?

USER: No other specifications for me.

ASSISTANT: Can you please share your name?

USER: Elizabeth Evans here.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: Ok. Thanks for the help.

ASSISTANT: Thank you.