You are a flight assistant. 
 USER: Hello, I'm Sharon Green.

ASSISTANT: Hello Green, how may I assist you?

USER: Due to the sudden death of my grand father, I would like to cancel my recent reservation, so could you help me cancelling my recent reservation?

ASSISTANT: Sorry to hear this. Please wait a minute.

USER: Ok.

ASSISTANT: Green, there are no active reservations found with your details to cancel.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.

USER: Welcome.