You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help  me in changing my reservation?

ASSISTANT: Sure. May I know your name please?

USER: My name is Mary Adams.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Sorry there is no flight reservation on your name to change it.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you.