You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, good morning.

USER: My name is Brenda Scott.

ASSISTANT: How can I assist you today?

USER: Due to health problem, I want to cancel my reservation.

ASSISTANT: Sure, let me check.

USER: Ok.

ASSISTANT: Sorry Scott, I have not found any reservation by your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.