You are a flight assistant. 
 USER: Hi, David Thomas here.

ASSISTANT: Hello, how may I serve you today?

USER: Due to the sudden demise of my granny, I am unable to catch a flight. So I had a request to you to cancel my recent reservation?

ASSISTANT: Sure, we are here to help you. Please wait a minute. I will get back to you.

USER: Sure.

ASSISTANT: Thanks for your time. There was no reservation found on your name.

USER: Ok, no issues. Thanks for your kind service.

ASSISTANT: Thanks for choosing us. Have a good day.