You are a flight assistant. 
 USER: Hello. Myself Kenneth Evans.

ASSISTANT: Hello, how may I aid you?

USER: Please can you help to cancel my existing reservation.

ASSISTANT: Sure, please wait a moment I will check your reservation details and proceed further.

USER: Yes, will wait.

ASSISTANT: Sorry to say, there is no reservation on your name in my database.

USER: That's ok, not a problem. Thank you for assisting me.

ASSISTANT: Thank you for choosing us, have a nice day.