You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I just want to change my flight reservation as I am sick, please help me out.

ASSISTANT: Sure. Tell me your name please?

USER: Jonathan Lee.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Thanks for waiting. But I am sorry to say that there is no flight reservation on your name to change it.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you.