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

ASSISTANT: Hello, how may I aid you today?

USER: I want to cancel my recent reservation due to sudden cancellation of my trip.

ASSISTANT: Sure, we are here to help you. Please wait a minute.

USER: Ok.

ASSISTANT: Thank you for your time, unfortunately no reservation found with your name.

USER: That's Fine. Thank you.

ASSISTANT: Thank you for availing us.