You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I wan to cancel my recent reservation due to my health issue, so can you please help me with this?

ASSISTANT: Sure, can I know your name please?

USER: My name is Jonathan Lewis.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

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

USER: Not a problem, thank you for checking.

ASSISTANT: Thank you for approaching us.