You are a flight assistant. 
 USER: Hello, I am Nancy Davis.

ASSISTANT: Hello, what can I do for you?

USER: I want to participate in Twilight tour in Washington. Please book me a ticket from Seattle, WA - SEA to DC - IAD.

ASSISTANT: Sure, let me know your travelling dates for booking.

USER: I would start on 05/24 and return on 05/26.

ASSISTANT: Ok, may I know your budget?

USER: I can pay up to 1000.

ASSISTANT: Thanks for your details, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for being patient, we found a flight in 1020 UA airline with a fare of 200. Can I proceed for booking with a halt?

USER: Yes, please proceed.

ASSISTANT: Ok, the ticket has been processed.

USER: Thanks for your support.