You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a flight ticket from DCA to JFK?

ASSISTANT: Sure, please share your planned travel dates?

USER: My travelling dates are July 21 to July 23.

ASSISTANT: Do you have any connection limit?

USER: I need a single connection of flight.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: Can I have your name please?

USER: Nicholas Jones here.

ASSISTANT: United Airline flight 1024 available with connection  and fare is 100, shall I confirm this economy class flight?

USER: Ok, please proceed to book.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for opting us.