You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Susan Clark this side, looking for single connection flight. Can you help me?

ASSISTANT: Sure, may I know your airport codes please?

USER: I am looking for the flights between DEN and AUS.

ASSISTANT: Ok, may I know your travelling dates please?

USER: I am planning to take off on 12/15 and return back on 12/17.

ASSISTANT: Ok, hold on for a moment. Let me check.

USER: Ensure that price is not more than 1000.

ASSISTANT: Sorry Susan, there are no flights on your requested dates. Sorry for the inconvenience provided.

USER: Ok, I will go by another means of transport.

ASSISTANT: Thank you for choosing us, have a safe flight.

USER: Thank you for your assistance.

ASSISTANT: Welcome.