You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best can I aid you?

USER: I am Joseph Moore. I want to book a flight ticket from CA - OAK to DC - DCA to meet my colleague in Washington.

ASSISTANT: Ok. May I know your dates of travel?

USER: I will start on 02/22, return on 02/24.

ASSISTANT: Ok, do you have any specifications?

USER: My price limit is 200.

ASSISTANT: We found an airline Southwest with flight 1004 having a fare 100 with halt. Shall I proceed to book?

USER: Yes, please.

ASSISTANT: Your booking has been processed.

USER: Thank you.

ASSISTANT: Thank you for opting us.