You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: I want to change my destination airport code in my existing reservation, can you please help me out?

ASSISTANT: Sure, I can change your reservation right now. Before that I need to know your good name please?

USER: Ok, my name is Raymond Miller.

ASSISTANT: Ok, wait for some time I will check the reservation on your name and get back to you.

USER: Ok.

ASSISTANT: We are sorry to say that, there is no active reservation found on your name.

USER: It's ok, thank you for the information.

ASSISTANT: Thanks for approaching us.