You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Donald Collins.

ASSISTANT: Yes Collins, how may I assist you?

USER: My business meeting has been cancelled.So, I would like to cancel my reservation which is under my name. Can you please help me with that?

ASSISTANT: Wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found with this name.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you.

USER: You are welcome.