You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want to cancel my recent reservation, as my health is not good. Can you please help me out with it?

ASSISTANT: Sure, may I know your name?

USER: Thank you. My name is William Thomas.

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

USER: Ok, no problem. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us.