You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Kenneth Evans. I would like to change my reservation as I am leaving for hometown, can you please help me out?

ASSISTANT: Sure, I will help you with that. Please wait for a moment, while I check for the reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

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

ASSISTANT: Thank you for visiting us, we hope see you again.