You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: I would like to change my sister's reservation as she is unwell, can you please help me out?

ASSISTANT: Sure, may I know your name to check the status and revert you?

USER: The reservation was done in the name of Virginia Perez.

ASSISTANT: Ok, please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found by your name in our data base.

USER: Not an issue. Anyway, thank you for checking.

ASSISTANT: Thank you for approaching us.