You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: Myself John Campbell.

ASSISTANT: Please wait a second I will check the update.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found under your name to cancel.

USER: That's fine, thank you for checking.