You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Sandra Martinez. I would like to book a flight ticket from IAD to OAK. Could you please help me out?

ASSISTANT: Sure, can I know your preferable dates?

USER: I am planning to board a direct flight on 06/30 and return back on 07/02.

ASSISTANT: I found a flight 1023 of Southwest airlines matches with your preferences, can I proceed?

USER: yes, please proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you for the help.

ASSISTANT: Thank you, have a good day.