You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to change my reservation because I am not feeling well, can you help me?

ASSISTANT: Sure. Let me check your details.

USER: Ok.

ASSISTANT: May I know your name?

USER: My name is Deborah King.

ASSISTANT: Sorry. There is no reservation on your name.

USER: No problem. Thank you for checking.

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