You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: My name is Dennis Jackson. My business meeting has been cancelled, so I would like to cancel my recent reservation which is under my name.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry to say, no reservation found with your data.

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

ASSISTANT: Thank you for choosing us.