You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am James Adams.

ASSISTANT: How can I assist you today?

USER: I am a techie and I need to attend a workshop on ORACLE in Dallas with my colleagues. Can you please book a ticket to 12/18?

ASSISTANT: Ok, I will help you. May I have your return date?

USER: After my workshop, I will return on 12/20.

ASSISTANT: What are your airport codes?

USER: Source code is Austin, AUS and destination is DFW.

ASSISTANT: Will you prefer a direct or connecting flight?

USER: I need connecting flight.

ASSISTANT: Ok, Thanks for your details. Sorry to inform you only direct flights available.

USER: No problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you.