You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to visit Olympic National Park at Washington, could you please help me with booking a flight ticket from JFK to DCA?

ASSISTANT: Sure, can you please help with your travelling dates?

USER: I would like to depart on Apr 20th and return on Apr 22nd.

ASSISTANT: Do you need a single connecting flight?

USER: I am looking for a connecting flight.

ASSISTANT: May I know your other preferences?

USER: I am looking for a economy class ticket.

ASSISTANT: Can you please let me know your name?

USER: I am Laura Hall.

ASSISTANT: There is a flight of United airline, flight number 1010 with the fare of 200. Shall I proceed?

USER: Please confirm the booking.

ASSISTANT: Your ticket has been booked.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Thank you for choosing us.