You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Donald King here.

ASSISTANT: How may I assist you?

USER: I need to travel SEA from DCA, can you please help me in booking flight ticket?

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

USER: My trip dates are 11/28 and 11/30.

ASSISTANT: Please hold on a moment.

USER: Take your time, search for a good flight.

ASSISTANT: I found a flight for you in Hawaiian airlines with fare 300, shall I book your ticket?

USER: Please proceed with the booking.

ASSISTANT: Ok, your booking is confirmed with flight number 1003.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us, have a nice day.