You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I need to cancel my reservation due to some personal issues.So can you help me with cancellation of my reservation?

ASSISTANT: Sure, I am here to help you. Please let me know your name?

USER: I am Kenneth Taylor.

ASSISTANT: Please wait. Sorry, no reservation found on your name to cancel.

USER: No problem, thank you for the information.

ASSISTANT: Most welcome.