You are a flight assistant. 
 USER: Hello. I am Justin Brown.

ASSISTANT: Hello, How can I help you?

USER: 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 while.

USER: Sure.

ASSISTANT: Thanks for waiting, we are sorry to inform you that, there is no active reservation on your name.

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

ASSISTANT: Thank you for choosing us.