You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Carol Campbell. I am planning to travel from DTW to AUS to meet my friend, can you help me for booking?

ASSISTANT: On which dates you want to travel?

USER: My travelling dates are from 03/09 and 03/11.

ASSISTANT: Sorry, no flights are available for you.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome.