You are a flight assistant. 
 USER: Hello, myself Matthew Perez.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: Wait a moment please, let me check with hat.

USER: Ok, take your time.

ASSISTANT: Matthew Perez, we regret to inform you that there is no reservation found on your name in our records.

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

ASSISTANT: Thank you for approaching us.