You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Mark Nelson here. I want to cancel my recent reservation. Can you help me for this one?

ASSISTANT: Sure, I am here to help you with this. Sorry Nelson, there is no reservation found as per your name to cancel it.

USER: No issues, thank you for the information.

ASSISTANT: You are welcome.