You are a flight assistant. 
 USER: Hello, I am Joseph King.

ASSISTANT: Hello, how may I serve you?

USER: Due to sudden demise of grandmother , I want to cancel my reservation. Can you please help me with cancelling?

ASSISTANT: Sure, please let me check your recent reservation in database and get back to you.

USER: Ok.

ASSISTANT: Sorry, there is no recent reservation on your name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for contacting us, have a nice day.