You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Jerry Hall. I want to change my reservation. Can you aid me?

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: Sorry Jerry, there is no active reservation found under your name in our records.

USER: Ok, no problem. Thank you.

ASSISTANT: Most welcome.