You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Daniel Miller.

ASSISTANT: How can I assist you?

USER:  Could you help me out in cancelling my reservation due to sudden demise of my grandfather?

ASSISTANT: Sure, I'm here to help you with that. Please wait for a while.

USER: Sure.

ASSISTANT: Miller, I found your reservation and I have successfully cancelled it.

USER: Thank you for your kind service.

ASSISTANT: Thank you for choosing us.