You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I aid you?

USER: I am John Martinez. Due to sudden demise of my grandmother, I need to cancel my reservation. Can you please help me?

ASSISTANT: Sure. Wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting. There is no reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for choosing us.