You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Samantha Harris.

ASSISTANT: Harris, how can I assist you?

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

ASSISTANT: Sure, I can do that for you. I will check your reservation status and let you know.

USER: Thank you.

ASSISTANT: Sorry Harris, I did not find any reservation under your name in our database.

USER: That's ok, thank you for your information.

ASSISTANT: You are most welcome.