You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to change my reservation due to some health issues, can you please help me out with that?

ASSISTANT: Sure, we are here to aid you.

USER: Thank you.

ASSISTANT: Can I know your name, please?

USER: Myself Virginia Perez.

ASSISTANT: Wait a minute.

USER: Sure.

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

USER: That's ok, no problem. Thank you for checking out.

ASSISTANT: Thank you for choosing us.