You are a flight assistant. 
 USER: Hello, I am Samantha Hill.

ASSISTANT: Hello, how may I assist you for today?

USER: Due to my health issue I want to cancel my recent reservation, so can you please assist me with this?

ASSISTANT: Sure, please wait a moment I will check your reservation details and get back to you.

USER: Sure.

ASSISTANT: Sorry, I regret to say that there is no reservation found under your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us, have a nice day.