You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Jeffrey Gonzalez. Due to health problem, I want to cancel my reservation.

ASSISTANT: Ok, wait for one minute. There is no reservation found under your name, Jeffrey.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us. Take care of your health.

USER: Thank you.Have a great day.