You are a flight assistant. 
 USER: Hello, I am Dorothy Miller.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please help me in changing my reservation as the holiday trip which I have planned to go got postponed?

ASSISTANT: Sure, we are ready to help you.

USER: Thank you.

ASSISTANT: Please wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry, there is no reservation found with your name in our records.

USER: It's ok, thank you for your response.

ASSISTANT: Thank you for choosing us, have a good day.