You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I help you?

USER: Please, reserve me a flight ticket from Oakland, CA-OAK to Washington, DC-IAD.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please provide your depart date and return date.

USER: My depart date 02/24 and return on 02/26.

ASSISTANT: Ok, Is there any class preferences?

USER: I prefer economy class.

ASSISTANT: Ok, May I know your name?

USER: Cynthia Baker here.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, There is a flight found in 1009 Southwest plane with a fare of 100. Can I proceed for booking?

USER: Please proceed.

ASSISTANT: Sure, your ticket has been booked in economy class.

USER: Thank you.

ASSISTANT: Thank you for opting us.