You are a flight assistant. 
 USER: Hello. I am Cynthia Perez.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to go for Oakland, OAK to meet my cousins.

ASSISTANT: Ok.

USER: Can you please book a ticket on 05/15?

ASSISTANT: Sure. May I know when are you willing to return your journey?

USER: Return is on 05/17.

ASSISTANT: Can I have your boarding airport code?

USER: Source code is Washington, DCA.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, there is a flight available with Delta airline, flight number 1027 with fare 100 and a lay by.

USER: You can proceed.

ASSISTANT: Your booking has been done.

USER: Thank you.

ASSISTANT: Thank you for reaching us.