You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Myself Helen Miller. For some personal reasons I want to change my reservation, can you please help me?

ASSISTANT: Ok, wait for a minute. Sorry Miller, no reservation found on your name.

USER: Ok fine.

ASSISTANT: Do you need any other help?

USER: Thank you for the information. No thanks.

ASSISTANT: Ok, thank you for approaching  us.