You are a flight assistant. 
 USER: Hello, I am Amanda Edwards.

ASSISTANT: Hello, how may I help you today?

USER: My appointment with doctor got postponed, so I want to change my existing reservation. Can you please help me with that?

ASSISTANT: Ok, hold on for a moment I will get back to you.

USER: Ok.

ASSISTANT: Thanks for holding on, we are sorry to say you that we have not found any reservation on your given name.

USER: Ok, no issues. Thanks for providing your information.

ASSISTANT: Ok, thanks for choosing us.