You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your good name please?

USER: I am Andrew Lee.

ASSISTANT: How may I help you?

USER: I just want to cancel my reservation due to sudden demise of my grand father, can you help me with cancellation of my trip?

ASSISTANT: Ok, please wait for a moment to cancel your reservation.

USER: Ok.

ASSISTANT: Thanks for waiting, no reservation found with your name to cancel the reservation.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thanks for opting us, have a nice day.