You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

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

ASSISTANT: Please hold a moment, let me check your details in our data base.

USER: Sure.

ASSISTANT: Sorry, there are no active reservation found on your given name.

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

ASSISTANT: Thank you for reaching our service.