You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Jerry Gonzalez, I would like to change my existing reservation due to postpone of my event coustume design. Could you please help me?

ASSISTANT: Sure, please wait a while.

USER: Ok.

ASSISTANT: Thank you for waiting, no reservation was found on your name.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for availing us.