You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you right now?

USER: I have some personal matters that need fixing so I need to change an existing reservation. Can you please help me in that?

ASSISTANT: No problem, I can help you to change your reservation. Please let me know your name at present to check your reservation status?

USER: My name is Richard Evans.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry to say this, we did not find any reservation on your name with us.

USER: Ok, not a problem.

ASSISTANT: Thanks for contacting us, have a good day.

USER: Thanks for your information.