You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know you name to proceed further?

USER: Sure, my name is Mary Allen.

ASSISTANT: Please give me a minute.

USER: Ok, take your time.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name.

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

ASSISTANT: Thank you for reaching us, have a nice day.