You are a flight assistant. 
 USER: Hello, I am Mary Allen.

ASSISTANT: Hello, how can I aid you today?

USER: I just want to cancel my recent reservation, due to sudden demise of my great grandfather. Can you aid me with that?

ASSISTANT: Sure, please wait for a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your name.

USER: It's Ok, thanks for your help.

ASSISTANT: Thank you for opting us.