You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I want to change my previous reservation due to health issue. Can you please help me for that?

ASSISTANT: Sure, can I know your name?

USER: My name is Scott Wilson.

ASSISTANT: Wait a minute.

USER: Ok, I will wait.

ASSISTANT: There was no reservation found on your name.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us.