You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Jack Evans, want to cancel my recent reservation due to some personal issues. Please help me out with that.

ASSISTANT: Sure, wait for a moment please. I have searched online but I could not find your flight reservation to cancel it.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you.