You are a flight assistant. 
 USER: Hi. William Anderson here.

ASSISTANT: Hello, how may I aid you today from my end?

USER: Can you cancel my flight ticket reservation?

ASSISTANT: Sure, I am here to help you out. Please allow me a moment to check the reservation status.

USER: Sure.

ASSISTANT: Sorry  William Anderson, there is no reservation on your name in our database.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for reaching us.