You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Raymond Moore here, I want to change my existing reservation due to sudden changes my meeting has been postponed. Can you please help me with it?

ASSISTANT: Sure, I am happy to help you. Please wait I will get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation found with your name. Thank you for approaching us.

USER: Not a problem, thank you.