You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry George, there is no active reservation found with your name in our records.

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

ASSISTANT: Most welcome.