You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: Due to my health problem I want to change my reservation, can you please help me that?

ASSISTANT: Sure. May I know your name?

USER: Myself Scott King.

ASSISTANT: Please wait for while.

USER: Ok.

ASSISTANT: Thanks for waiting. There is no reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for choosing us.