You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carol Miller.

ASSISTANT: How can I help you?

USER: My meeting has been postponed, so I would like to change my existing reservation. Can you please aid me in changing?

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation found by your name.

USER: Ok, no issues.

ASSISTANT: Thank you.

USER: Thank you.