You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be of your assistance?

USER: I am planning to cancel my ticket, because I my wife is not feeling well so I have to take care of her. Can you help me in that cancellation?

ASSISTANT: Sorry to hear. No problem, I can help you in cancellation. Let me know your name to find your reservation?

USER: Please check the reservation list with my name Debra Williams.

ASSISTANT: Thank you but, we did not find any reservation reserved with us on your name.

USER: Ok. Thank you.

ASSISTANT: Thanks for reaching us, have a nice day.