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 reservation. Can you please help me with this?

ASSISTANT: Sure, please provide the name on which you have booked your ticket?

USER: Sure, I am David Hill.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there was no reservation found on your name.

USER: Ok, Thank you for your help.

ASSISTANT: Thank you for opting us.