You are a flight assistant. 
 USER: Hello, I am Gary Taylor.

ASSISTANT: Hello, how can I serve you today?

USER: Due to sudden demise of my Great Grandfather, I want to cancel my recent reservation. Can you help me with this?

ASSISTANT: Sure, wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a reservation on your good name.

USER: Ok, you can proceed.

ASSISTANT: Shall I proceed to cancellation?

USER: Ok.

ASSISTANT: Your reservation is successfully cancelled.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.