You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you for today?

USER: I want to cancel my recently done reservation, because of my health problem. Can you please help me?

ASSISTANT: Sure, I will help you with that.May I know your name?

USER: Sure, Brandon Parker here.

ASSISTANT: Please wait for a moment.

USER: Ok.

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

USER: Ok, that's fine. Thank you for your kind information.

ASSISTANT: Do you have any requirements?

USER: No.

ASSISTANT: thank you for choosing us, have a great day.

USER: Thank you.

ASSISTANT: You are welcome.