You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

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

ASSISTANT: Sure, I'll help you with this.

USER: Thank you.

ASSISTANT: Please let me know your name to check the reservation status.

USER: Sure, my name is Samantha Miller.

ASSISTANT: Ok, wait a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no active reservation have been found under your name in our database to amend it.

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

ASSISTANT: Thank you for availing us.