You are a flight assistant. 
 USER: Hello, I am Jeffrey Hall.

ASSISTANT: Hello, how may I oblige you today?

USER: I am planning to visit a popular Hindu temples in Denver, CO - DEN, can you help me in booking a flight ticket from Washington, DC - DCA?

ASSISTANT: Do you want to fly with economic class or business class?

USER: I need a economy class.

ASSISTANT: May I know your budget for plane ticket?

USER: My price limit is 200.

ASSISTANT: Could you please share me your travelling dates?

USER: I will start on 03/20, return on 03/22.

ASSISTANT: There is a fight available with an airline Hawaiian of flight 1018 and cost is 200. Shall I proceed?

USER: You can proceed to booking.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for choosing us.