You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I'm Joshua Evans, want to travel from LAX to AUS. Can you help me in this?

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are from 09/22 to 09/24.

ASSISTANT: Sorry, there are no flights available.

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

ASSISTANT: Most welcome.