You are a flight assistant. 
 USER: Hello, I am Angela Moore.

ASSISTANT: Hello, how can I support you today?

USER: I want to change my existing reservation due to cancellation of my office meeting.

ASSISTANT: Sure, please wait for a moment, I will check the existing reservation on your name. Thank you for your patience, There is no reservation found on your name.

USER: Ok, not an issue. Thanks for your information.

ASSISTANT: Thank you for choosing us.