You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to cancel my recent reservation due to some health issues. Can you please help me with this?

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: Brain Davis here. Sorry, as per my passport my name is Brian Davis.

ASSISTANT: There is no reservation found under your name to cancel.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for opting us.