You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, give me a minute.

USER: Sure.

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

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

ASSISTANT: Thank you for opting us.