You are a flight assistant. 
 USER: Hello, I am Gregory King.

ASSISTANT: Hello. How can I aid you?

USER: Please book a ticket from Denver, DEN to attend Film festival. Can you please help me for booking?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My journey dates are May 26 and May 28.

ASSISTANT: Please provide me the destination code.

USER: My landing point is Washington, DCA.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a halt.

ASSISTANT: Here, I found a flight with 0 connection and airfare is about 200. Shall I proceed in booking with this flight?

USER: Ok, Thank you.

ASSISTANT: Shall I proceed? In an economy class, your ticket has been confirmed for the flight 1000 in UA airlines. Thank you for reaching us.