You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you please change my recent reservation in the name Betty Anderson?

ASSISTANT: May I know your name please?

USER: Myself Betty Anderson.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found basis on your details.

USER: Ok, fine thank you for checking.