You are a flight assistant. 
 USER: Hello. I am Jennifer Lewis.

ASSISTANT: Hello, how may I help you?

USER: As my meeting with my lawyer has been postponed, so I would like to change my reservation. Can you help me with it?

ASSISTANT: Sure, please hold on.

USER: Sure.

ASSISTANT: Sorry to notify you that, there is no reservation found on your given name.

USER: Its ok, thank you for your assistance.

ASSISTANT: Thanks for approaching us.