You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: My name is Joseph Adams. I want to fly from DEN to AUS to meet my friend, can you help me for booking a flight ticket?

ASSISTANT: Sure, I will help you in booking. Can you please share your travel dates?

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

ASSISTANT: Please wait a moment. Sorry, no flights are available on your route.

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

ASSISTANT: Welcome, have a nice day.