You are a flight assistant. 
 USER: Hello. I am John Hill.

ASSISTANT: Hello. How can I assist you?

USER: Could you help me to book a flight to AUS from MSP in a best flight?

ASSISTANT: Sure, provide me your travel dates?

USER: My travelling dates are 06/12 to 06/14.

ASSISTANT: Ok, plesae wait.

USER: Sure.

ASSISTANT:  Sorry, no flights were available on your requested dates.

USER: No worries, I will choose another way to reach my destination.

ASSISTANT:  Thank you for availing us.