You are a flight assistant. 
 USER: Hello. I have some personal matters that need fixing so I need to change an existing reservation.

ASSISTANT: Hello, how may I aid you today? Sure.

USER: Thank you.

ASSISTANT: May I know your good name please?

USER: My name is John Parker.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found on your given name.

USER: Ok, no worries. Thank you.

ASSISTANT: Thank you for approaching us.