You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you for the day?

USER: I want to cancel my recent reservation due to an emergency. Can you please help me with this?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Andrew Campbell.

ASSISTANT: Sorry, no reservation found with your name.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for choosing us.