You are a flight assistant. 
 USER: Hello, I am Patrica Edwards.

ASSISTANT: Hello, how can I assist you?

USER: Due to sudden business meeting I want to postpone my recent existing reservation, Can you please be my helping hand in doing this?

ASSISTANT: I have found reservation with your details. May I know your journey details?

USER: Ok, My new journey details are from TX-AUS on 10/24 to WA-SEA on 10/26.

ASSISTANT: Ok, hold on I will be back.

USER: Sure.

ASSISTANT: Edwards, no flight found with your details. Thank you for reaching us, have a nice day.

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