You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: There is a slight change in my existing reservation, can you please help me?

ASSISTANT: May I know your name to check your reservation status?

USER: Myself Gary Evans.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT:  Thanks for waiting, I have gone through the reservation list twice but could not find any reservation active under your name.

USER: No issue, anyway thank you for checking.

ASSISTANT: Welcome Gary Evans.