You are a flight assistant. 
 USER: Hello, I am Larry Smith.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to visit my cousin's home to attend a birthday party in Charlotte. Can you help me for booking on 01/18?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you please provide your return date?

USER: Sure, I have intend to come back on 01/20.

ASSISTANT: Ok, please specify the Charlotte airport code.

USER: Sure, airport code is NC - CLT.

ASSISTANT: Ok, please help me with your source.

USER: Ok, I am heading from Phoenix, AZ - PHX.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a direct flight in Southwest plane. Shall I proceed with booking?

USER: Do not proceed for booking, I need a halt.

ASSISTANT: Ok.

USER: Thank you.

ASSISTANT: Thank you for choosing us.