You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: My business meeting got postponed, can you please help me in changing my existing reservation?

ASSISTANT: Sure, I am here to help you with that. May I know your name?

USER: I am Betty Williams.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you for reaching us.