You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I want to book a flight a flight ticket from AUS to DEN. Could you help me in booking?

ASSISTANT: I am here to help you about that. Can you please provide your planned dates of journey?

USER: My travelling dates are from May 05-07.

ASSISTANT: Can you please provide your name for booking purpose?

USER: Daniel Brown here.

ASSISTANT: Do you need any connecting flight for your journey?

USER: I need 1 connecting flight.

ASSISTANT: Do you have any other requirements for your journey?

USER: My return time should be in the morning and I prefer for economy class.

ASSISTANT: Sorry to say this Daniel Brown, there are no flights to your region as per your requirements.

USER: That's ok, no problem. Thank you.

ASSISTANT: You are welcome, thank you for reaching us.