You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I need to change my reservation which I have done to meet my friend but now he is not in a position to meet me so please help me with that.

ASSISTANT: Ok, please share your name so that I can help you.

USER: Sure, myself Pamela Wright.

ASSISTANT: There is no reservation on your name Pamela Wright.

USER: It's ok fine. Anyway, thank you for your time.

ASSISTANT: Welcome, have a nice day.