You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Joseph Rodriguez. I want to cancel my reservation, due to some health issue.

ASSISTANT: Sure, I will help you. Please give me a moment to check your details.

USER: Ok.

ASSISTANT: I have found your reservation in my database, shall I proceed to cancel?

USER: Ok, please proceed.

ASSISTANT: Your reservation is successfully cancelled.

USER: Thank you for your help.

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

USER: Welcome.