You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Andrew Carter. I would like to change my reservation as I got sick, can you please help me out?

ASSISTANT: I am glad to assist you Carter, please wait for a while.

USER: Thank you. Sure.

ASSISTANT: Carter, I have not found any reservation under your name in our database.

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

ASSISTANT: You are most welcome and thank you for reaching us.