You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Richard Gonzalez.

ASSISTANT: How may I help you?

USER: Due to health problem, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Sure, give me a minute?

USER: Ok.

ASSISTANT: Sorry to say that there is no reservation found.

USER: Ok, thank you for helping me.

ASSISTANT: Thank you.