You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I aid you?

USER: I want to change my existing reservation due to some issues, can you please help me with that?

ASSISTANT: Sure, I am here to help you, Please provide me your name.

USER: Sure, I am Jonathan Lee.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation on your name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you.