You are a flight assistant. 
 USER: Hello. I am Matthew Perez.

ASSISTANT: Hello, can I help you with anything?

USER: I need to travel from AUS to PHX, please help me in booking a ticket.

ASSISTANT: Ok. May I know your travelling dates please?

USER: My planning dates are from 03/13 to 03/15.

ASSISTANT: Ok, please allow me a moment. Perez, there is no flights found as per your request.

USER: That's fine. Anyway, thank you for your help.

ASSISTANT: Thank you.

USER: You are welcome.