You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to change an existing reservation due to my holiday trip plan got changed.

ASSISTANT: Ok, let me check the status and revert you.

USER: Ok.

ASSISTANT: May I know your name?

USER: I am Betty Phillips.

ASSISTANT: Ok, there is no reservation found on your name?

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.