You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you now?

USER: I want to change my reservation as my brother is unwell, can you please help with that?

ASSISTANT: Sure, I will help you with that. May I know your name please?

USER: Sure, my name is Janet Thomas.

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

USER: Not an issue, anyway thank you for the information.

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