You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

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

ASSISTANT: Sure, I will help you with that. May I know your name for checking your previous reservation status?

USER: Myself Eric Walker.

ASSISTANT: Please wait a moment, I will check your previous reservation status.

USER: Sure.

ASSISTANT: There is no previous reservation available in your name.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us, have a good day Eric Walker.