You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I assist you?

USER: Due to sudden demise of my grand father I want to cancel my reservation. Could you help me in cancelling my reservation?

ASSISTANT: Ok, sure I am here to help you. Can you please tell me your name?

USER: Thank you, I am James Wilson.

ASSISTANT: Sorry, no reservation found on your name in my database.

USER: Ok, not a problem/. Thank you for quick response.

ASSISTANT: Most welcome.