You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Edward Garcia and I just want to change an existing reservation due to my interview got post pone.

ASSISTANT: Sure, Please wait a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, There is no reservation found with your name.

USER: Ok, thanks for information.

ASSISTANT: Thank you for availing us, Have a nice day ahead.