You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Brian Williams, I want to cancel my flight reservation as I am unwell, can you please help me?

ASSISTANT: Sure, give me a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for reaching us.