You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Donald Mitchell. Can you cancel my reservation which I done recently?

ASSISTANT: Ok, please wait.

USER: Ok, take your own time.

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

USER: Ok, not a problem. I think it is already been cancelled by my friend. Thank you for the information and help.

ASSISTANT: Thank you and have a nice day.