You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you for the day?

USER: Due to my health problem I want to cancel my reservation, can you help me that?

ASSISTANT: Sure, may I know your good name to cancel your reservation?

USER: My name is Andrew Lewis.

ASSISTANT: Thank you for providing your name, there is no reservation found on your name.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thanks for your help.