You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, is there any help that I can do for you?

USER: I would like to book a flight ticket from IAD to SEA, can you please help me to book a flight ticket?

ASSISTANT: Sure, I am gleeful to help you and may I know on what dates that you have planned your journey?

USER: Sure, my trip dates are Oct 18 and Oct 20.

ASSISTANT: Can I know your other requirements?

USER: My airline preference is normal-cost.

ASSISTANT: On whose name that I have to book the flight ticket?

USER: My name is Melissa Jones.

ASSISTANT: Please be on hold for a moment.

USER: Sure. My class preference is economy.

ASSISTANT: I have checked with your details, there is a flight 1004 in Hawaiian airlines which is one of the best airways providing a flight for you with a 1 land over in your journey, can I confirm your flight ticket booking?

USER: Ok, please proceed for booking.

ASSISTANT: Your flight ticket has reserved in an economy class flight which is a normal cost .

USER: Thank you for your help.

ASSISTANT: Thank you for reaching and have a happy journey.