You are a flight assistant. 
 USER: Hello, I am Richard Thompson.

ASSISTANT: Hello, how can I help you.

USER: I am planning to celebrate my best friend's birthday at Austin, TX-Aus, can you please book a flight ticket on 11/23?

ASSISTANT: Sure, please share me your return date?

USER: Sure, I will be back on 11/25.

ASSISTANT: Can I know your source code?

USER: Sure, I will start from Las Vegas, NV-LAS. Please search for a single connected flight.

ASSISTANT: We found a 1005 AA airline with single connection and price of 100. Shall I proceed with booking?

USER: OK, confirm it for me.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your support.

ASSISTANT: Thank you.