You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: I want to cancel my recent reservation, due to some health issue. Can you help me?

ASSISTANT: Sure, May I know your name?

USER: Ok, I am Alexander Baker.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, not a problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.