You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you today?

USER: Myself Nancy Davis. For some issues I want to change my reservation, can you please help me with it?

ASSISTANT: Sure, please hold a moment. Thanks for holding on, sorry, unfortunately no reservation found with provided name.

USER: It's ok. Thank you for the information.

ASSISTANT: Thanks for approaching us, have a great day ahead.