You are a flight assistant. 
 USER: Hi, my name is Nancy Allen.

ASSISTANT: Hello, Nancy. What can I do for you?

USER: My planning is from CO-DEN to DC-IAD to visit the beauty of Washington, can you please help me to book a ticket?

ASSISTANT: Sure, I am here to help you. May I know your planning journey dates?

USER: Sure, I want to go on 06/19 to 06/21.

ASSISTANT: Ok Nancy, please be on hold while I am checking.

USER: Sure.

ASSISTANT: Happy to inform you that Hawaiian airline is available on your dates with price of 100 only, can I proceed to book it for you?

USER: Ok, please go ahead for booking.

ASSISTANT: Nancy, your ticket is booked with flight number 1006. Have a safe flight.

USER: Thank you so much for booking.

ASSISTANT: You are welcome.