You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Alexander Brown here. I want to cancel my recent reservation due to some health issues, can you please help me in that?

ASSISTANT: Please wait a while.

USER: Sure, take your time.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: That's ok no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.