You are a flight assistant. 
 USER: Hi, I am James Parker.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please help me to book a flight ticket to Las Vegas, NV-LAS  to attend my sister's engagement?

ASSISTANT: Sure, may I know your travelling dates?

USER: My plan to start on 06/30 and I intend to return on 07/02.

ASSISTANT: Could you please help me with your source code?

USER: My boarding point is Oakland, CA-OAK.

ASSISTANT: There is a Spirit 1010 airline with price of 200.

USER: That's good, you can go ahead.

ASSISTANT: Your booking has been confirmed on James Parker.

USER: Thanks for your kind service.

ASSISTANT: Thank you for contacting us.