You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Due to sudden demise of my Great grandfather, I want to cancel my recent reservation.

ASSISTANT: Sure, I'll help you in cancellation. Could you please let me know your name to check the reservation status?

USER: Ok, I am Kenneth Lopez.

ASSISTANT: Thank you for giving your name, I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.

USER: Ok, Thank you.

ASSISTANT: Thank you for opting us.