You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in changing my recent reservation? As my meeting got postponed.

ASSISTANT: Sure, may I know your name please?

USER: Myself Karen Young.

ASSISTANT: Please wait.

USER: Sure, I will wait.

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

USER: Thanks for your information.

ASSISTANT: Most welcome.