You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am planning to travel from AUS to DFW. Can you please help me to book a ticket?

ASSISTANT: Sure, when are you planning to travel?

USER: I want to depart on Oct 17.

ASSISTANT: When do you want to return on?

USER: I intend to return on Oct 19.

ASSISTANT: Do you need a connecting flight or a direct flight?

USER: I need a connecting flight.

ASSISTANT: Can I know your good name?

USER: Andrew Hall here.

ASSISTANT: Is there any other specifications?

USER: I would prefer business class.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you.