You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Cynthia Wilson here. I would like to change my existing reservation, can you please assist me in changing?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

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

USER: Ok, no issues. Thank you.

ASSISTANT: Most welcome.\.