You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I need to cancel my reservation as I am not feeling well. Can you help me with that?

ASSISTANT: I am here to help you, may I know your name to check your reservation?

USER: Thanks for your concern. My name is Paul Green.

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

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Welcome Paul Green.