You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this time?

USER: I want to cancel my reservation due to health problem, can you help me in cancelling it?

ASSISTANT: Sure, I am ready to help you with that. May I know your good name for verification?

USER: Myself Samantha Gonzalez.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry Samantha, no reservation has found under your name.

USER: No problem, thanks for checking.

ASSISTANT: Most welcome. Thank you for choosing us.