You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Sandra Smith, can you book a flight ticket from AUS to LAX?

ASSISTANT: Sure, may I know your journey dates please?

USER: Ok, my travel dates are 01/01 and 01/03.

ASSISTANT: Wait for a while please. Sandra Smith, there are no flights available in your route.

USER: Ok, not a problem. Thank you for assisting me.

ASSISTANT: Thank you for reaching us.