You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I'm James Clark. I am planning to visit Zilker Park in AUS, can you book a ticket from PHX?

ASSISTANT: Sure. Can I know your travelling dates?

USER: My travel dates are from 11/15 to 11/17.

ASSISTANT: Sorry to say, no flights found as per your planned dates.

USER: It's ok. Thank you for your immediate reply.

ASSISTANT: Thank you for contacting us.