You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am John Hernandez. I want to cancel my recent reservation due to my health issue. Can you help me out?

ASSISTANT: Sure, I will help you. Please give me a minute.

USER: Sure.

ASSISTANT: Thanks for being with patience. I regret that there is no reservation found on your name.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for opting us.