You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service today?

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

ASSISTANT: May I know your name please?

USER: Thomas Campbell here.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thank you for choosing us.