You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: As I am a scientist, I want to attend science festival with my students at Washington. Can you do the reservation?

ASSISTANT: Sure, we are here to help you. Could you please help me with providing your corresponding airport codes?

USER: Sure. My airport codes are OAK-DCA.

ASSISTANT: Kindly assign your preferred dates of travelling?

USER: Dates are 04/24 and 04/26.

ASSISTANT: May I know your name?

USER: William Hall here.

ASSISTANT: We found a Hawaiian airline, flight number:1018 and the price is 200.

USER: Please do the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you so much.

ASSISTANT: Thank you.