You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your name please?

USER: Due to my ill health, I need your help in changing the existing reservation.

ASSISTANT: Sure, please provide me your name?

USER: My name is Brian Wilson.

ASSISTANT: Sorry, there is no reservation found by your name.

USER: Ok, no issues.

ASSISTANT: Do you want any more information please?

USER: No, thank you for providing information.

ASSISTANT: Thank you and get will soon.