You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what help that you need from our agency?

USER: I am Thomas Hernandez. I would lie to change my reservation as I got hospitalised, can you please help me out?

ASSISTANT: Sure, I will help you in that one.

USER: Thank you.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: There is no reservation that has found on your name to modify it.

USER: Ok no problem, thank you for your services.

ASSISTANT: It's my pleasure, have a nice day.