You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me to change my active reservation as my meeting was changed?

ASSISTANT: Sure, may I know your name please?

USER: Gregory Johnson.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

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

USER: Ok, no problem in that. Thank you.

ASSISTANT: Most welcome.