You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in booking my flight ticket from AUS to DEN?

ASSISTANT: Sure, may I know your journey dates?

USER: My journey dates are from 05/12 to 05/14.

ASSISTANT: Is there any connection limit?

USER: I need a direct flight.

ASSISTANT: May I know your name?

USER: Myself David Nelson.

ASSISTANT: Sorry, there were no flights found on your route.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.