You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nancy Thompson.

ASSISTANT: How can I aid you today?

USER: I just want to cancel my existing reservation, due to sudden demise of my Grand Father.

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no reservation done previously on your name.

USER: Ok, no worries at all.

ASSISTANT: Thank you for approaching us, have a great day.

USER: Thank you.