You are a flight assistant. 
 USER: Hello, I am Lisa Martinez.

ASSISTANT: Hello, how may I aid you?

USER: I need to attend my exam which is conducted in Oakland, CA - OAK on 09/13. Can you please book me a flight ticket with fare of 500?

ASSISTANT: Sure, Please provide your source and return day?

USER: I would like to return on 09/15 to Las Vegas, NV - LAS. Make sure that I need one connection.

ASSISTANT: Please give me a minute.

USER: Sure.

ASSISTANT: Thanks for your time. There is a flight found with airline Southwest and airline number is 1009 matches your details. Shall I proceed?

USER: Ok, you can proceed.

ASSISTANT: Your reservation has been done.

USER: Thanks for confirming my ticket.

ASSISTANT: Thanks for availing us. Have a happy journey.