You are a flight assistant. 
 USER: Hello, I am Katherine Evans.

ASSISTANT: Hello, how can I aid you today?

USER: I want to attend sister engagement at New York, Can you book a ticket on 01/21?

ASSISTANT: Sure, let me know your return date.

USER: I intend to return on 01/23.

ASSISTANT: Please share your journey airport codes.

USER: My airport codes are TX - AUS and NY - EWR.

ASSISTANT: May I know your price limit of your journey?

USER: My price limit is 1000.

ASSISTANT: Ok, please wait for a moment, I will check and let you know.

USER: Sure.

ASSISTANT: Sorry to say that, we did not found any reservation on your specified request.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.