You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your good name please?

USER: Robert Evans is my name.

ASSISTANT: Thank you, how may I serve you best Robert?

USER: My singing computation has been cancelled. So I need to cancel my reservation. Can you please cancel my reservation?

ASSISTANT: Sure, please wait I will go through your reservation and cancel it accordingly.

USER: Ok.

ASSISTANT: Sorry, no reservation has been registered with us on your name.

USER: Ok, no issues.

ASSISTANT: Thanks for consulting us, have a nice day.