You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you at this moment?

USER: Due to my health problem I want to cancel my recent reservation, can you please help me to cancel my reservation?

ASSISTANT: Sure, I am happy to help you with that. Can I have your good name please to check your reservation status?

USER: My name is Anthony Brown.

ASSISTANT: Ok, please wait a moment to get the reservation details.

USER: Sure.

ASSISTANT: Sorry Anthony Brown, no reservation has found under your name to cancel.

USER: Not an issue, thank you for your information.

ASSISTANT: Thank you for choosing us, have a great day.