You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I be of your service?

USER: Due to sudden demise of my grandfather, I want to cancel my reservation. Can you please help me out?

ASSISTANT: Sure, I'll try help you in cancellation.

USER: Thank you.

ASSISTANT: Could you please provide me your name to check the reservation status?

USER: Sure, my reservation has been done on the name of Deborah Lopez.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, we did not found any reservation on your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for remaining so positive. We hope to serve you again.