You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: I am Jeffery Roberts.

ASSISTANT: How can I assist you?

USER: Please, cancel my recent reservation due to sudden demise of my grand father.

ASSISTANT: Sure, please be on hold.

USER: Sure.

ASSISTANT: Roberts, there is no reservation found under your name to do cancellation.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for choosing us.