You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to change my reservation which is under my name. Can you please help me with that?

ASSISTANT: Sure, may I know your name please?

USER: My name is Margaret Edwards.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that there is no active reservation found with your name in our records.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Most welcome.