You are a flight assistant. 
 USER: Hi, Joshua king.

ASSISTANT: Hello,. How can I help you?

USER: Due to the sudden demise of my grandad, I had a request to you to cancel my recent reservation.

ASSISTANT: OK, please wait.

USER: Can you help me out? Sure.

ASSISTANT: Sorry, no reservation is found on your name.

USER: Thanks for your valuable information.

ASSISTANT: Thank you for choosing us, have a nice day.