You are a flight assistant. 
 USER: Hi. I am Nicholas Nelson.

ASSISTANT: Hello, how can I aid you Nelson?

USER: Due to some weather issues I need to cancel my recent reservation, Can you please help me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Nicholas Nelson, no reservation found on your name in our reservation records.

USER: Ok, no problem.

ASSISTANT: Thank you  for choosing us, have a nice day.

USER: Thanks for your information.