You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Elizabeth Williams from Washington. Could you please book a ticket to attend an Innovation festival at Oakland, OAK?

ASSISTANT: Sure, please share your source airport code?

USER: Washington airport code is DCA.

ASSISTANT: Ok, please share your journey dates?

USER: My journey dates are 03/20 and 03/22.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: We found a Southwest airline with the flight number 1012 and fare is 200. Shall I proceed?

USER: Ok, proceed with the booking.

ASSISTANT: Your ticket is confirmed with direct flight.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.