You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am George Scott. I want to book a ticket from AUS to DFW, can you help me?

ASSISTANT: Sure, let me know your travelling dates.

USER: My travel dates are 12/16 and 12/18.

ASSISTANT: Please share your specifications.

USER: I need a direct flight.

ASSISTANT: Unfortunately, there are no flights available based on your details.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for choosing us.