You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Rachael Smith. I want to do some modifications in my previous reservation, due to some health issue. Can you please help me?

ASSISTANT: Sure, I am here to help you out. Please allow me a moment.

USER: Sure, I will wait for your information.

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

USER: That's ok, not an issue. Anyway thank you for checking.

ASSISTANT: Thank you for reaching us.