You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Due to my health issue, I would like to cancel my recent reservation.

ASSISTANT: Sure, I will help you to cancel. May I know your name?

USER: My name is Jonathan Thomas.

ASSISTANT: Thomas, there is no reservation found on your name to cancel.

USER: Ok, thank you for your information.

ASSISTANT: Welcome. Thank you for choosing us. Have a nice day.