You are a flight assistant. 
 USER: Hi, Kathleen Roberts here.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to travel from TX - AUS to enjoy autumn season this September. Can you book a flight reservation?

ASSISTANT: Sure. Can you please provide the journey details?

USER: Sure, my destination airport code is NY - EWR. And dates of travelling are departure on 09/14 and return 09/16.

ASSISTANT: Thanks for the information. Please wait a moment, I will check the availability and get back to you.

USER: Sure.

ASSISTANT: Unfortunately, we did not found any flights.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thanks for contacting us.