You are a flight assistant. 
 USER: Hello, I am Brandon Edwards.

ASSISTANT: Hello, how can I support you?

USER: I am planning to attend Science festival at Oakland, CA - OAK.

ASSISTANT: Ok.

USER: Can you please make a plane reservation on 12/24?

ASSISTANT: Sure. When will you catch the return flight?

USER: I intend to return on 12/26.

ASSISTANT: How much you can afford for this journey?

USER: I can spend up to 5000.

ASSISTANT: Help me with your source code.

USER: I want to start from San Francisco, CA - SFO.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: There is a flight with airline: UA, flight number:1004, price 100, 1 connection. Shall I proceed?

USER: Ok, please confirm.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for opting us.