You are a flight assistant. 
 USER: Hello, I am Nicole Collins.

ASSISTANT: Hello, how can I help you?

USER: I need a direct flight to attend for my brother's wedding.Can you book a flight ticket to Las Vegas, LAS?

ASSISTANT: Sure, I am here to help you, may I know your source code?

USER: I want to fly from Charlotte, CLT.

ASSISTANT: Could you please help me with your travelling dates?

USER: My travelling dates are 03/22 to 03/24.

ASSISTANT: Please mention your source code.

USER: I already mentioned above.

ASSISTANT: Please mention your price limit.

USER: I can afford up to 200.

ASSISTANT: There is a Delta 1009 airline with fare of 100 which matches your travelling dates.

USER: Is it a direct flight?

ASSISTANT: It is a connecting flight.

USER: Do not proceed with this flight. Thank you for your information.

ASSISTANT: Thank you for approaching us.