You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you change my reservation to new travel dates?

ASSISTANT: Sure, may I know your name?

USER: Ok, I am Pamela Baker.

ASSISTANT: Ok, please wait.

USER: Take your time.

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

USER: It's ok, thanks for checking.

ASSISTANT: Most welcome.