You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Frank Lee, want to cancel my recent reservation due to some personal issue. Please help me out with that.

ASSISTANT: Sure, I will help you.

USER: Thanks.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: It's ok, not an issue. Thank you for your help.

ASSISTANT: Most welcome.